10 mg oral BID

5 mg of CP-690,550 oral BID or Placebo oral BID, as appropriate based on treatment withdrawal/retreatment design

5 mg oral BID

The PGA of psoriasis is scored on a 5-point scale, reflecting a global consideration of the erythema, induration, and scaling across all psoriatic lesions. Average erythema, induration, and scaling are scored separately over the whole body according to a 5-point severity scale (0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe).

The PGA of psoriasis is scored on a 5-point scale, reflecting a global consideration of the erythema, induration, and scaling across all psoriatic lesions. Average erythema, induration, and scaling are scored separately over the whole body according to a 5-point severity scale (0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe). PGA response defined as 0 (clear) or 1 (almost clear).

PASI50-75 response defined as a reduction of at least 50% but less than 75%. The DLQI is a general dermatology questionnaire that consists of 10 items that assess participant health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

Adequate response defined as >50% reduction of the Visit A4/Week 24 (last visit in Period A) PASI response.

Adequate response defined as >50% reduction of the Visit A4/Week 24 (last visit in Period A) PASI response.

The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. PASI responses at each period are relative to Baseline-A where Baseline-A was defined as the last observation up to first dosing date in Period A. Weeks 4 and 8 are relative to the Period B baseline and are the same as Weeks 28 and 32, which are relative to Period A baseline. 95% confidence interval is constructed using the normal approximation to the binomial distribution of two-sample proportion.

The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. PASI responses at each period are relative to Baseline-A where Baseline-A was defined as the last observation up to first dosing date in Period A. 95% confidence interval is constructed using the normal approximation to the binomial distribution of two-sample proportion.

Adequate PASI response defined as less than or equal to 50% reduction of the Visit A4/Week 24 PASI Response.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline. PASI responses at each period are relative to Baseline-A, where Baseline-A is defined as the last observation up to first dosing date in Period A. 95% confidence interval constructed using the normal approximation to the binomial distribution of one-sample proportion.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline. Baseline defined as the last observation up to the first dosing date in Period A. 95% confidence interval is constructed using the normal approximation to the binomial distribution of one-sample proportion.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline. PASI responses in each period are relative to Baseline-A, where Baseline-A is defined as the last observation until first dosing date in Period A. 95% confidence interval is constructed using the normal approximation to the binomial distribution of one-sample proportion.

PASI75 response defined as at least a 75% reduction in PASI relative to baseline. PASI responses in each period are relative to Baseline-A, where Baseline-A is defined as the last observation until first dosing date in Period A. 95% confidence interval is constructed using the normal approximation to the binomial distribution of one-sample proportion.

PGA response was defined as 0 (clear) or 1 (almost clear) on a 5-point scale where 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. 95% confidence interval is constructed using the normal approximation to the binomial distribution of one-sample proportion.

PGA response was defined as 0 (clear) or 1 (almost clear) on a 5-point scale where 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. 95% confidence interval is constructed using the normal approximation to the binomial distribution of two-sample proportion.

PGA response was defined as 0 (clear) or 1 (almost clear) on a 5-point scale where 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. 95% confidence interval is constructed using the normal approximation to the binomial distribution of one-sample proportion.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Baseline defined as the last observation up to first dosing date in Period A.

Baseline defined as the last observation up to first dosing date in Period B.

Baseline was defined as the last observation until first dosing date in Period C.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Assessment of BSA with psoriasis performed separately for 4 body regions: head and neck, upper limbs, trunk (including axillae and groin), and lower limbs (including buttocks). The %surface area with psoriasis was estimated by means of the handprint method, where the full palmar hand of the participant (fully extended palm, fingers and thumb together) represented approximately 1% of the total BSA. The number of handprints of psoriatic skin in a body region was used to determine the extent (%) to which a body region was involved with psoriasis.

Baseline defined as the last observation up to first dosing date in Period A.

Baseline defined as the last observation up to first dosing date in Period B.

Baseline defined as the last observation up to first dosing date in Period C.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period C.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline-B defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline-C defined as last observation up to first dosing date in Period C.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period C.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period B.

Combined assessment of lesion severity and area affected into single score; range=0(no disease)-72(maximal disease). Body divided into 4 sections=head, upper/lower limbs, trunk; each area scored by itself and scores combined for final PASI. For each section percent area of skin involved was estimated:0(0%)-6(90-100%) and severity estimated by clinical signs of erythema, induration, scaling; ranged 0-4: 0=none, 1=slight, 2=moderate, 3=marked, 4=very marked. Final PASI=sum of severity parameters for each section*area score*weighing factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4). PASI score can vary in increments of 0.1; higher scores represent greater severity of psoriasis. Baseline defined as last observation up to first dosing date in Period C.

PASI quantifies the severity of psoriasis based on both lesion severity and the percent of BSA) affected. PASI is a composite score by the investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head and neck, upper limbs, trunk, and lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of the body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis.

PASI quantifies the severity of psoriasis based on both lesion severity and the percent of BSA) affected. PASI is a composite score by the investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head and neck, upper limbs, trunk, and lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of the body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis.

PASI quantifies the severity of psoriasis based on both lesion severity and the percent of BSA) affected. PASI is a composite score by the investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head and neck, upper limbs, trunk, and lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of the body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis.

PASI quantifies severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head/neck, upper limbs, trunk, lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

PASI quantifies severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head/neck, upper limbs, trunk, lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

PASI quantifies severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head/neck, upper limbs, trunk, lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

PASI quantifies the severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by the investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head and neck, upper limbs, trunk, and lower limbs), with adjustment for the percent of BSA involved for each body region and for the proportion of the body region to the whole body. The PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis.

PASI quantifies severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head/neck, upper limbs, trunk, lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

PASI quantifies severity of psoriasis based on both lesion severity and percent of BSA affected. PASI is a composite score by investigator of degree of erythema, induration, and scaling (scored separately) for each of 4 body regions (head/neck, upper limbs, trunk, lower limbs), with adjustment for percent of BSA involved for each body region and for proportion of body region to the whole body. PASI score can vary in increments of 0.1 and range from 0.0-72.0; higher scores representing greater severity of psoriasis. Baseline-A defined as last observation up to first dosing date in Period A.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends. Baseline-A defined as the last observation up to first dosing date in Period A.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends. Baseline-B defined as the last observation up to first dosing date in Period B.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends. Baseline-C defined as the last observation up to first dosing date in Period C.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The severity of itch (pruritus) due to psoriasis was assessed using the ISI, a single item, horizontal numeric rating scale. Participants were asked to rate "your worst itching due to psoriasis over the past 24 hours" on a numeric rating scale anchored by the terms "No itching" (0) and "Worst possible itching" (10) at the ends.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-A defined as the last observation up to first dosing date in Period A.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-B defined as the last observation up to first dosing date in Period B.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-C defined as the last observation up to first dosing date in Period C.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3).

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3).

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3).

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3). The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-A defined as the last observation up to first dosing date in Period A.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3). The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-B defined as the last observation up to first dosing date in Period B.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much); higher scores indicate poor quality of life. The DLQI can be analyzed under 6 subscales by combining questions and is categorized as follows: symptoms and feelings (maximum score=6); daily activities (maximum score=6); leisure (maximum score=6); work and school (maximum score=3); personal relationships (maximum score=6); and treatment (maximum score=3). The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-C defined as the last observation up to first dosing date in Period C.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline. Baseline-C defined as the last observation up to first dosing date in Period C.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). Severity is measured using the following categories of scores: 0-1=no effect on patients' lives; 2-5=small effect; 6-10=moderate effect; 11-20=very large effect; 21-30=extremely large effect.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The DLQI questions are rated by the participant as 0 (not at all/not relevant) to 3 (very much) with a total score range of 0 (best) to 30 (worst); higher scores indicate poor quality of life. The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The DLQI is a general dermatology questionnaire that consists of 10 items that assess health related quality of life (daily activities, personal relationships, symptoms and feelings, leisure, work and school, and treatment). The minimally important difference for the DLQI has been estimated as a 2 to 5 point change from baseline.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). A PCS score and MCS score are based on a normalized sum of the 8 scale scores; PCS/MCS summary concept score = (raw score*10) plus 50. Linear transformations were performed to transform scores to a mean of 50 and standard deviations (SDs) of 10, in the general population. In norm-based scoring, each scale is scored to have same average (50)/SD (10). With this method anytime a scale score is below 50, health status is below average, and each point is one-tenth of a SD. Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). A PCS score and MCS score are based on a normalized sum of the 8 scale scores; PCS/MCS summary concept score = (raw score*10) plus 50. Linear transformations were performed to transform scores to a mean of 50 and SDs of 10, in the general population. In norm-based scoring, each scale is scored to have same average (50)/SD (10). With this method anytime a scale score is below 50, health status is below average, and each point is one-tenth of a SD. Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). A PCS score and MCS score are based on a normalized sum of the 8 scale scores; PCS/MCS summary concept score = (raw score*10) plus 50. Linear transformations were performed to transform scores to a mean of 50 and SDs of 10, in the general population. In norm-based scoring, each scale is scored to have same average (50)/SD (10). With this method anytime a scale score is below 50, health status is below average, and each point is one-tenth of a SD. Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). A PCS score and MCS score are based on a normalized sum of the 8 scale scores; PCS/MCS summary concept score = (raw score*10) plus 50. Linear transformations were performed to transform scores to a mean of 50 and SDs of 10, in the general population. In norm-based scoring, each scale is scored to have same average (50)/SD (10). With this method anytime a scale score is below 50, health status is below average, and each point is one-tenth of a SD. Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). Higher scores indicate a better health related quality of life.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). Higher scores indicate a better health related quality of life. Baseline-A defined as the last observation up to first dosing date in Period A.

The SF-36 is a general health status questionnaire that assesses 8 domains of functional health and well being: Physical Functioning, Role Limitations due to Physical Health Problems, Bodily Pain, Social Functioning, Mental Health, Role Limitations due to Emotional Problems, Vitality, and General Health Perceptions. The score for a section is an average of the individual question scores, which are scaled 0-100 (100=highest level of functioning). Higher scores indicate a better health related quality of life. Baseline-C defined as the last observation up to first dosing date in Period C.

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe.

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe.

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. Response defined as score of 0 or 1.

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. Response defined as score of 0 or 1.

The PtGA asks the participant to evaluate the overall cutaneous disease at that point in time on a single item, 5 point scale. The scale is scored as follows: 0=clear; 1=almost clear; 2=mild; 3=moderate; and 4=severe. Response defined as score of 0 or 1.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Scoring formula developed by EuroQol Group assigns a utility value for each domain in the profile. Score is transformed and results in a total score range -0.594 to 1.000; higher score indicates a better health state. The VAS component rates current health state on a scale from 0 (worst imaginable health state) to 100 (best imaginable health state); higher scores indicate a better health state.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Scoring formula developed by EuroQol Group assigns a utility value for each domain in the profile. Score is transformed and results in a total score range -0.594 to 1.000; higher score indicates a better health state. The VAS component rates current health state on a scale from 0 (worst imaginable health state) to 100 (best imaginable health state); higher scores indicate a better health state.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Scoring formula developed by EuroQol Group assigns a utility value for each domain in the profile. Score is transformed and results in a total score range -0.594 to 1.000; higher score indicates a better health state. The VAS component rates current health state on a scale from 0 (worst imaginable health state) to 100 (best imaginable health state); higher scores indicate a better health state. Baseline-A defined as the last observation up to first dosing date in Period A.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Scoring formula developed by EuroQol Group assigns a utility value for each domain in the profile. Score is transformed and results in a total score range -0.594 to 1.000; higher score indicates a better health state. The VAS component rates current health state on a scale from 0 (worst imaginable health state) to 100 (best imaginable health state); higher scores indicate a better health state. Baseline-C defined as the last observation up to first dosing date in Period C.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression. The score for each of the 5 dimensions can range from 1 to 3; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed").

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression. The score for each of the 5 dimensions can range from 1 to 3; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed").

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression. The score for each of the 5 dimensions can range from 1 to 3; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Baseline-A defined as the last observation up to first dosing date in Period A.

EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression. The score for each of the 5 dimensions can range from 1 to 3; 1 indicates better health state (no problems); 3 indicates worst health state ("confined to bed"). Baseline-C defined as the last observation up to first dosing date in Period C.

Participants received CP-690,550 5 mg tablets orally BID for 24 weeks in Period A (Initial Treatment) followed by CP-690,550 5 mg tablets orally BID for 4, 8, 12, or 16 weeks during Period B (Double-Blind Treatment Withdrawal) followed by CP-690,550 5 mg tablets orally BID for up to 28 weeks in Period C (Double-Blind Re-Treatment)

Participants received CP-690,550 5 mg tablets orally BID for 24 weeks in Period A (Initial Treatment) followed by placebo tablets orally BID for 4, 8, 12, or 16 weeks during Period B (Double-Blind Treatment Withdrawal) followed by CP-690,550 5 mg tablets orally BID for up to 28 weeks in Period C (Double-Blind Re-Treatment)

Participants received CP-690,550 10 mg tablets orally BID for 24 weeks in Period A (Initial Treatment) followed by CP-690,550 10 mg tablets orally BID for 4, 8, 12, or 16 weeks during Period B (Double-Blind Treatment Withdrawal) followed by CP-690,550 10 mg tablets orally BID for up to 28 weeks in Period C (Double-Blind Re-Treatment)

Participants received CP-690,550 10 mg tablets orally BID for 24 weeks in Period A (Initial Treatment) followed by placebo tablets orally BID for 4, 8, 12, or 16 weeks during Period B (Double-Blind Treatment Withdrawal) followed by CP-690,550 10 mg tablets orally BID for up to 28 weeks in Period C (Double-Blind Re-Treatment)