Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

An NRS was used to capture a participant's self-reporting of her/his worst fingernail pain and average fingernail pain due to fingernail psoriasis. The participant rated the severity of fingernail pain over the past 7 days on a scale from 0 indicating no pain, to 10 indicating severe pain. A negative change from Baseline indicates improvement.

Participants were asked to rate the impact of their fingernail psoriasis on their ability to perform physical tasks (eg, typing, housework, buttoning a shirt or blouse, picking up coins from a table, tying shoes, yard work, etc.) over the past 7 days on a scale of 0 indicating no impact on ability to perform physical tasks, to 10 indicating severe impact on ability to perform physical tasks. A negative change from Baseline indicates improvement.

The range of possible scores was 0 to 20 for scalp psoriasis, with a score of 0 indicating absence of psoriasis. A decrease in B-SNIPI score indicates improvement. Data presents the percentage of participants achieving 50% improvement in the scalp component of the B-SNIPI among participants with Baseline scalp score of ≥ 6.

The PGA-F is a 5-point scale used to assess fingernails separately for nail bed signs and nail matrix signs of disease. A global score of between 0 indicating clear, and 4 indicating severe, was separately assigned for nail bed involvement and nail matrix involvement. A participant's overall global score was the worse of the nail bed and nail matrix score. Data presents the percentage of participants with a nail bed component of the PGA-F that met definition of "clear" (0) or "minimal" (1) among those with a Baseline nail bed component of "moderate" or "worse."

The PGA-F is a 5-point scale used to assess fingernails separately for nail bed signs and nail matrix signs of disease. A global score of between 0 indicating clear, and 4 indicating severe, was separately assigned for nail bed involvement and nail matrix involvement. A participant's overall global score was the worse of the nail bed and nail matrix score. Data presents the percentage of participants with a nail matrix component of the PGA-F that met definition of "clear" (0) or "minimal" (1) among those with a Baseline nail matrix component of "moderate" or "worse."

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

Each fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 80, with a score of 0 indicating absence of nail psoriasis and 80 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

Each fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 80, with a score of 0 indicating absence of nail psoriasis and 80 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. A decrease in PASI score indicates improvement.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. A decrease in PASI score indicates improvement.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. PASI-75, 50, 90, and 100 responses are the percentage of participants with a Baseline PASI score ≥ 5 who achieved at least a 75%, 50%, 90%, or 100% reduction (improvement), respectively, from Baseline in PASI score at Week 26. A 100% reduction was considered complete clearance of psoriasis. Data presents the percentage of participants achieving PASI 75/50/90/100 responses at Week 26 among participants with a Baseline PASI score ≥ 5.

The PGA-S is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall lesion severity was assessed, with 0 indicating cleared and 5 indicating severe. A decrease in PGA-S score indicates improvement. Data present the percentage of participants achieving a PGA-S of "clear" (0) or "minimal" (1) with at least a 2-grade improvement relative to Baseline at Week 26.

The PGA-S is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall lesion severity was assessed, with 0 indicating cleared and 5 indicating severe. A decrease in PGA-S score indicates improvement. Data present the percentage of participants achieving a PGA-S of "clear" (0) with at least a 2-grade improvement relative to Baseline at Week 26.

The range of possible B-SNIPI scores was 0 to 20 for inverse psoriasis, with a score of 0 indicating absence of psoriasis and a score of 20 indicating most severe psoriasis. A decrease in B-SNIPI score indicates improvement. Data presents the percentage of participants achieving 50% improvement in the inverse component of the B-SNIPI among participants with a Baseline inverse psoriasis score of ≥ 6.

BSA affected by psoriasis was measured by the physician selecting the participant's right or left hand as the measuring device. For purposes of clinical estimation, the total surface of the palm plus 5 digits was to be assumed to be approximately equivalent to 1% BSA. Measurement of the total area of involvement by the physician was aided by imagining if scattered plaques were moved so that they were next to each other and then estimated the total area involved. A decrease in BSA affected by psoriasis indicates improvement.

BSA affected by psoriasis was measured by the physician selecting the participant's right or left hand as the measuring device. For purposes of clinical estimation, the total surface of the palm plus 5 digits was to be assumed to be approximately equivalent to 1% BSA. Measurement of the total area of involvement by the physician was aided by imagining if scattered plaques were moved so that they were next to each other and then estimated the total area involved. A decrease in BSA affected by psoriasis indicates improvement.

An NRS was used to capture a participant's self-reporting of her/his worst fingernail pain and average fingernail pain due to fingernail psoriasis. The participant rated the severity of fingernail pain over the past 7 days on a scale from 0 indicating no pain, to 10 indicating severe pain. A negative change from Baseline indicates improvement.

Participants were asked to rate the impact of their fingernail psoriasis on their ability to perform physical tasks (eg, typing, housework, buttoning a shirt or blouse, picking up coins from a table, tying shoes, yard work, etc.) over the past 7 days on a scale of 0 indicating no impact on ability to perform physical tasks, to 10 indicating severe impact on ability to perform physical tasks. A negative change from Baseline indicates improvement.

Participants rated specific impacts of fingernail psoriasis on various aspects of their QoL over the past 7 days on a 5-point scale, with 0 indicating not at all, and 4 indicating very impactful. A participant's overall global score was the mean of all items and could range from 0 to 4, with 0 indicating no impact and 4 indicating most impact. A decrease in NAPPA QoL score indicates improvement.

Participants rated specific impacts of fingernail psoriasis on various aspects of their QoL over the past 7 days on a 5-point scale, with 0 indicating not at all, and 4 indicating very impactful. A participant's overall global score was the mean of all items and could range from 0 to 4, with 0 indicating no impact and 4 indicating most impact. A decrease in NAPPA QoL score indicates improvement.

Participants assessed symptoms and impacts of dermatologic diseases on their QoL over the past 7 days, with 0 indicating not at all, and 3 indicating very much. The range of possible DLQI scores was 0 to 30, with a score of 0 indicating no effect at all on a participant's life and a score of 30 indicating extremely large effect on participant's life. A decrease in DLQI score indicates improvement.

Participants assessed symptoms and impacts of dermatologic diseases on their QoL over the past 7 days, with 0 indicating not at all, and 3 indicating very much. The range of possible DLQI scores was 0 to 30, with a score of 0 indicating no effect at all on a participant's life and a score of 30 indicating extremely large effect on participant's life. A decrease in DLQI score indicates improvement. Data presents the percentage of participants with a score of 0 (no effect) or 1 (little effect) at Week 26.

The WPAI: NPSO assessed impact of fingernail psoriasis on work productivity and non-work activity limitation. Participants were asked during the past 7 days, how many hours did you miss from work because of problems associated with your fingernail psoriasis (absenteeism), during the past seven days, how many hours did you miss from work because of any other reason, such as vacation, holidays, time off to participate in this study (presenteeism), how much did your fingernail psoriasis affect your productivity while you were working (overall work impairment), and much did your fingernail psoriasis affect your ability to do your regular daily activities, other than work at a job (activity impairment). Answers were rated on an 11-point scale, with 0 indicating "fingernail psoriasis had no effect on this" and 10 indicating "fingernail psoriasis completely prevented me from this." A decrease in the WPAI:NPSO score indicates improvement.

The EQ-5D-5L descriptive system comprises 5 dimensions of health (mobility, self -care, usual activities, pain/discomfort, and anxiety/depression) to describe the subject's current health state. Each dimension comprises 5 levels with corresponding numeric scores, where 1 indicates no problems, and 5 indicates extreme problems. A unique EQ-5D-5L health state is defined by combining the numeric level scores for each of the 5 dimensions and the total score is normalized from -0.594 to 1.000, with higher scores representing a better health state. An increase in the EQ-5D-5L total score indicates improvement.

The EQ-5D VAS records the participant's self-rated health status on a vertical graduated scale from 0 to 100, with 0 indicating the worst imaginable health state and 100 indicating the best imaginable health state. An increase in EQ-5D-5L VAS score indicates improvement.

Participants rated their anxiety and depression over the past 7 days at Week 26. The range of possible scores was 0 to 21, with a score of 0 indicating absence of anxiety and depression and 21 indicating the most severe anxiety and depression. A decrease in HADS score indicates improvement.

The percentage of participants with a new diagnosis of PsA (ie, with an adverse event of PsA) during the study, among participants without PsA at Baseline.

Participants were asked how their fingernail psoriasis impacted their overall quality of life over the past 7 days on an 11-point scale, with 0 indicating no impact, and 10 indicating severe impact. A negative change from Baseline indicates improvement.

Total of all reporting groups

Period A: ADA 40 mg sc eow for 25 weeks starting 1 week after initial loading dose of 80 mg. Period B: Placebo at Week 26 followed by ADA 40 mg sc eow from Week 27 through Week 51.

The PGA-F is a 5-point scale used to assess fingernails separately for nail bed signs and nail matrix signs of disease. A global score of between 0 indicating clear, and 4 indicating severe, was separately assigned for nail bed involvement and nail matrix involvement. A participant's overall global score was the worse of the nail bed and nail matrix score. Data presents the percentage of participants with a PGA-F overall global score that met the definition of "clear" (0) or "minimal" (1) with at least a 2-grade improvement relative to Baseline at Week 26.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 80, with a score of 0 indicating absence of nail psoriasis and 80 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

An NRS was used to capture a participant's self-reporting of her/his worst fingernail pain and average fingernail pain due to fingernail psoriasis. The participant rated the severity of fingernail pain over the past 7 days on a scale from 0 indicating no pain, to 10 indicating severe pain. A negative change from Baseline indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline.

Participants were asked to rate the impact of their fingernail psoriasis on their ability to perform physical tasks (eg, typing, housework, buttoning a shirt or blouse, picking up coins from a table, tying shoes, yard work, etc.) over the past 7 days on a scale of 0 indicating no impact on ability to perform physical tasks, to 10 indicating severe impact on ability to perform physical tasks. A negative change from Baseline indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline.

The range of possible scores was 0 to 20 for scalp psoriasis, with a score of 0 indicating absence of psoriasis. A decrease in B-SNIPI score indicates improvement. Data presents the percentage of participants achieving 50% improvement in the scalp component of the B-SNIPI among participants with Baseline scalp score of ≥ 6.

ITT Population in Period A: all participants who were randomized at Baseline. Scalp psoriasis was assessed by B-SNIPI at Week 26 for participants enrolled under Protocol Amendment 1 in the US and Puerto Rico only. Multiple imputation.

The PGA-F is a 5-point scale used to assess fingernails separately for nail bed signs and nail matrix signs of disease. A global score of between 0 indicating clear, and 4 indicating severe, was separately assigned for nail bed involvement and nail matrix involvement. A participant's overall global score was the worse of the nail bed and nail matrix score. Data presents the percentage of participants with a nail bed component of the PGA-F that met definition of "clear" (0) or "minimal" (1) among those with a Baseline nail bed component of "moderate" or "worse."

ITT Population in Period A: all participants who were randomized at Baseline and had a Baseline nail bed component of "moderate" or "worse." Multiple imputation.

The PGA-F is a 5-point scale used to assess fingernails separately for nail bed signs and nail matrix signs of disease. A global score of between 0 indicating clear, and 4 indicating severe, was separately assigned for nail bed involvement and nail matrix involvement. A participant's overall global score was the worse of the nail bed and nail matrix score. Data presents the percentage of participants with a nail matrix component of the PGA-F that met definition of "clear" (0) or "minimal" (1) among those with a Baseline nail matrix component of "moderate" or "worse."

ITT Population in Period A: all participants who were randomized at Baseline and had a Baseline nail matrix component of "moderate" or "worse." Multiple imputations.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for psoriasis with mNAPSI. The range of possible scores was 0 to 13, with a score of 0 indicating absence of nail psoriasis and a score of 13 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for psoriasis with mNAPSI, and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 130, with a score of 0 indicating absence of nail psoriasis and a score of 130 indicating the most severe nail psoriasis. A decrease in mNAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 80, with a score of 0 indicating absence of nail psoriasis and 80 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The target fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI. The range of possible scores was 0 to 8, with a score of 0 indicating absence of nail psoriasis and 8 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Each fingernail was assessed for nail matrix psoriasis and nail bed psoriasis with NAPSI and the scores of all 10 fingernails were combined. The range of possible scores was 0 to 80, with a score of 0 indicating absence of nail psoriasis and 80 indicating most severe nail psoriasis. A decrease in NAPSI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. A decrease in PASI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. A decrease in PASI score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

PASI is a composite score based on the degree of effect on body surface area of psoriasis and the extension of erythema (reddening), induration (plaque thickness), desquamation (scaling) of the lesions and area affected as observed on the day of examination. The score ranges from 0 to 72, with 0 indicating no psoriasis and 72 indicating very severe psoriasis. PASI-75, 50, 90, and 100 responses are the percentage of participants with a Baseline PASI score ≥ 5 who achieved at least a 75%, 50%, 90%, or 100% reduction (improvement), respectively, from Baseline in PASI score at Week 26. A 100% reduction was considered complete clearance of psoriasis. Data presents the percentage of participants achieving PASI 75/50/90/100 responses at Week 26 among participants with a Baseline PASI score ≥ 5.

ITT Population in Period A: all participants who were randomized at Baseline and had a Baseline PASI score ≥ 5. Multiple imputation.

The PGA-S is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall lesion severity was assessed, with 0 indicating cleared and 5 indicating severe. A decrease in PGA-S score indicates improvement. Data present the percentage of participants achieving a PGA-S of "clear" (0) or "minimal" (1) with at least a 2-grade improvement relative to Baseline at Week 26.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The PGA-S is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall lesion severity was assessed, with 0 indicating cleared and 5 indicating severe. A decrease in PGA-S score indicates improvement. Data present the percentage of participants achieving a PGA-S of "clear" (0) with at least a 2-grade improvement relative to Baseline at Week 26.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

The range of possible B-SNIPI scores was 0 to 20 for inverse psoriasis, with a score of 0 indicating absence of psoriasis and a score of 20 indicating most severe psoriasis. A decrease in B-SNIPI score indicates improvement. Data presents the percentage of participants achieving 50% improvement in the inverse component of the B-SNIPI among participants with a Baseline inverse psoriasis score of ≥ 6.

ITT Population in Period A: all participants who were randomized at Baseline and had Baseline inverse psoriasis score ≥ 6. Inverse psoriasis was assessed for participants enrolled under Protocol Amendment 1 in the US and Puerto Rico only. Multiple imputation.

BSA affected by psoriasis was measured by the physician selecting the participant's right or left hand as the measuring device. For purposes of clinical estimation, the total surface of the palm plus 5 digits was to be assumed to be approximately equivalent to 1% BSA. Measurement of the total area of involvement by the physician was aided by imagining if scattered plaques were moved so that they were next to each other and then estimated the total area involved. A decrease in BSA affected by psoriasis indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

BSA affected by psoriasis was measured by the physician selecting the participant's right or left hand as the measuring device. For purposes of clinical estimation, the total surface of the palm plus 5 digits was to be assumed to be approximately equivalent to 1% BSA. Measurement of the total area of involvement by the physician was aided by imagining if scattered plaques were moved so that they were next to each other and then estimated the total area involved. A decrease in BSA affected by psoriasis indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

An NRS was used to capture a participant's self-reporting of her/his worst fingernail pain and average fingernail pain due to fingernail psoriasis. The participant rated the severity of fingernail pain over the past 7 days on a scale from 0 indicating no pain, to 10 indicating severe pain. A negative change from Baseline indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline and had an assessment (participants with an observed baseline value >0). Multiple imputation.

Participants were asked to rate the impact of their fingernail psoriasis on their ability to perform physical tasks (eg, typing, housework, buttoning a shirt or blouse, picking up coins from a table, tying shoes, yard work, etc.) over the past 7 days on a scale of 0 indicating no impact on ability to perform physical tasks, to 10 indicating severe impact on ability to perform physical tasks. A negative change from Baseline indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline and had an assessment (participants with an observed baseline value >0). Multiple imputation.

Participants rated specific impacts of fingernail psoriasis on various aspects of their QoL over the past 7 days on a 5-point scale, with 0 indicating not at all, and 4 indicating very impactful. A participant's overall global score was the mean of all items and could range from 0 to 4, with 0 indicating no impact and 4 indicating most impact. A decrease in NAPPA QoL score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.

Participants rated specific impacts of fingernail psoriasis on various aspects of their QoL over the past 7 days on a 5-point scale, with 0 indicating not at all, and 4 indicating very impactful. A participant's overall global score was the mean of all items and could range from 0 to 4, with 0 indicating no impact and 4 indicating most impact. A decrease in NAPPA QoL score indicates improvement.

ITT Population in Period A: all participants who were randomized at Baseline. Multiple imputation.