Number of participants according to alcohol use were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants according to history of comorbidities were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib. One participant might have more than one history of comorbidities.

Duration of rheumatoid arthritis in participants at the time of index date was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Participants age at onset of rheumatoid arthritis at the time of index date was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

CDAI was a simplified index for assessing the disease activity comprising of the swollen joint counts (SJC), tender/painful joint counts (TJC), participant's global assessment of disease activity (PtGA) and physician's global assessment of disease activity (PGA). CDAI is the numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher scores indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 centimeter (cm) visual analog scale (VAS); higher scores indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants according to CDAI category were reported in this outcome measures. CDAI was simplified index for assessing disease activity comprising of SJC, TJC, PtGA and PGA. CDAI is numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher score indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 cm VAS; higher score indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher score indicated worse condition. Score range-Remission: CDAI less than or equal to (<=) 2.8. Low Disease Activity: CDAI greater than (>) 2.8 and <= 10. Moderate Disease Activity: CDAI > 10 and <= 22. High Disease Activity: CDAI > 22. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Tender joint count was used to measure the pain and inflammation in the joints, based on 28-joint assessment range from 0 to 28, where higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Swollen joint count was used to measure the pain and inflammation in the joints. Based on 28-joint assessment range from 0 to 28, where higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

PGA-VAS was used to assess disease activity; assessed on 0-100 millimeter (mm) VAS; higher scores indicated greater affection due to disease activity. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

mHAQ is the modified version of HAQ which simplifies it from 20 questions to 8 questions, which assessed the ability to perform tasks due to rheumatoid arthritis. It comprised of 8 questions on 8 categories of daily living activities: dress/groom; arise; eat; grip; walk; hygiene; reach; and common activities over past week before specified time point. Eight items were rated on a 4-point Likert scale from 0 to 3, where 0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, and 3 = unable to do. Overall score was computed as the sum of domain scores and divided by the number of domains answered. Total score ranged from 0 to 3, where 0 = least difficulty and 3 = extreme difficulty, higher scores indicated worse functioning. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Pain VAS was assessed using 100 millimeter (mm) horizontal line to rate pain. Score ranged from 0 mm to 100 mm; where, 0 = no pain and 100 = worst possible pain. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Participants assessed their fatigue using a 0 to 100 mm VAS scale, where 0 mm = no fatigue and 100 mm = worst possible fatigue. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

EQ-5D-3L is a health profile questionnaire used to assess quality of life along 5 dimensions. Participants rated 5 aspects of health (walking, self-care, usual activities, pain/discomfort, and anxiety/depression) by choosing from 3 answering options (1=no problems; 2=some problems; 3=extreme problems). The mean of the summed score ranged from 1 to 3 with "1" corresponding to no problems and "3" corresponding to severe problems in the 5 dimensions, where higher score indicated more severe problems. In this outcome measure number of participants with a domain score of 2 or higher in each individual domain are reported. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants according to previous drug therapies with csDMARD were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants were classified according to line of therapy in which Tofacitinib was initiated and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants classified according to concomitant therapies were reported in this outcome measure. One participant might have received more than one concomitant therapy. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Percentage of participants who used rituximab directly before tofacitinib were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Duration of prior RTX use (in months) was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants were classified according to line of therapy in which Rituximab was initiated were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants were classified according to year of rituximab discontinuations and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Percentage of participants who discontinued rituximab were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants were classified according to reasons for discontinuation of rituximab and were reported in this outcome measure. Reasons for discontinuation of rituximab included safety, effectiveness, insurance, participant doing well and other reasons. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Number of participants were classified according to year of tofacitinib initiation and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

CDAI was a simplified index for assessing the disease activity comprising of the swollen joint counts (SJC), tender/painful joint counts (TJC), participant's global assessment of disease activity (PtGA) and physician's global assessment of disease activity (PGA). CDAI is the numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher scores indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 centimeter (cm) visual analog scale; higher scores indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

HAQ: self-reported, valid assessment of functional disability in RA. The 20-question instrument assessed ability of participants to perform daily activities in 8 functional areas: dressing, arising, eating, walking, hygiene, reaching, griping, and conducting daily activities. Eight items were rated on a 4-point Likert scale from 0 to 3, where 0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, and 3 = unable to do. Overall score was computed as the sum of domain scores and divided by the number of domains answered. Total score ranged from 0 to 3, where 0 = least difficulty and 3 = extreme difficulty, higher scores indicating worse functioning. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Pain VAS was assessed using 100 mm horizontal line to rate pain. Score ranged from 0 mm to 100 mm; where, 0 = no pain and 100 = worst possible pain. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Participants assessed their fatigue using a 0 to 100 mm VAS scale, where 0 mm = no fatigue and 100 mm = worst possible fatigue. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

"Number Analyzed" refers to number of participants, with available data for this measure.

Body Mass Index (BMI) was classified as Normal or underweight which indicated participants with BMI (kg/m^2) less than 25 (<25), Overweight which indicated participants with BMI (kg/m^2) from 25 to less than 30 (25-<30) and obese which indicated participants with BMI (kg/m^2) greater than or equal to 30 (>=30).

"Number Analyzed" refers to number of participants, with available data for this measure.

Participants diagnosed with RA, enrolled in CorEvitas RA registry who initiated tofacitinib with a history of rituximab use on or after 06-Nov-2012 and with 6-month visit were included in this reporting group.

Number of participants who were college graduate or had higher education were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Number of participants according to smoking status was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Number of participants according to work status was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Number of participants according to alcohol use were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Number of participants according to history of comorbidities were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib. One participant might have more than one history of comorbidities.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Duration of rheumatoid arthritis in participants at the time of index date was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Participants age at onset of rheumatoid arthritis at the time of index date was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

CDAI was a simplified index for assessing the disease activity comprising of the swollen joint counts (SJC), tender/painful joint counts (TJC), participant's global assessment of disease activity (PtGA) and physician's global assessment of disease activity (PGA). CDAI is the numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher scores indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 centimeter (cm) visual analog scale (VAS); higher scores indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants according to CDAI category were reported in this outcome measures. CDAI was simplified index for assessing disease activity comprising of SJC, TJC, PtGA and PGA. CDAI is numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher score indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 cm VAS; higher score indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher score indicated worse condition. Score range-Remission: CDAI less than or equal to (<=) 2.8. Low Disease Activity: CDAI greater than (>) 2.8 and <= 10. Moderate Disease Activity: CDAI > 10 and <= 22. High Disease Activity: CDAI > 22. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Tender joint count was used to measure the pain and inflammation in the joints, based on 28-joint assessment range from 0 to 28, where higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Swollen joint count was used to measure the pain and inflammation in the joints. Based on 28-joint assessment range from 0 to 28, where higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

PGA-VAS was used to assess disease activity; assessed on 0-100 millimeter (mm) VAS; higher scores indicated greater affection due to disease activity. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

mHAQ is the modified version of HAQ which simplifies it from 20 questions to 8 questions, which assessed the ability to perform tasks due to rheumatoid arthritis. It comprised of 8 questions on 8 categories of daily living activities: dress/groom; arise; eat; grip; walk; hygiene; reach; and common activities over past week before specified time point. Eight items were rated on a 4-point Likert scale from 0 to 3, where 0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, and 3 = unable to do. Overall score was computed as the sum of domain scores and divided by the number of domains answered. Total score ranged from 0 to 3, where 0 = least difficulty and 3 = extreme difficulty, higher scores indicated worse functioning. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Pain VAS was assessed using 100 millimeter (mm) horizontal line to rate pain. Score ranged from 0 mm to 100 mm; where, 0 = no pain and 100 = worst possible pain. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Participants assessed their fatigue using a 0 to 100 mm VAS scale, where 0 mm = no fatigue and 100 mm = worst possible fatigue. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

EQ-5D-3L is a health profile questionnaire used to assess quality of life along 5 dimensions. Participants rated 5 aspects of health (walking, self-care, usual activities, pain/discomfort, and anxiety/depression) by choosing from 3 answering options (1=no problems; 2=some problems; 3=extreme problems). The mean of the summed score ranged from 1 to 3 with "1" corresponding to no problems and "3" corresponding to severe problems in the 5 dimensions, where higher score indicated more severe problems. In this outcome measure number of participants with a domain score of 2 or higher in each individual domain are reported. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants according to previous drug therapies with csDMARD were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants were classified according to line of therapy in which Tofacitinib was initiated and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants classified according to concomitant therapies were reported in this outcome measure. One participant might have received more than one concomitant therapy. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Percentage of participants who used rituximab directly before tofacitinib were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Duration of prior RTX use (in months) was reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants were classified according to line of therapy in which Rituximab was initiated were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Number of participants were classified according to year of rituximab discontinuations and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure.

Percentage of participants who discontinued rituximab were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

Number of participants were classified according to reasons for discontinuation of rituximab and were reported in this outcome measure. Reasons for discontinuation of rituximab included safety, effectiveness, insurance, participant doing well and other reasons. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study. Here ''Number of Participants Analyzed'' signifies number of participants evaluable for this outcome measure. This outcome measure was planned to be analyzed only in tofacitinib group.

Number of participants were classified according to year of tofacitinib initiation and were reported in this outcome measure. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved and observed in this study.

CDAI was a simplified index for assessing the disease activity comprising of the swollen joint counts (SJC), tender/painful joint counts (TJC), participant's global assessment of disease activity (PtGA) and physician's global assessment of disease activity (PGA). CDAI is the numerical sum of 4 outcome parameters: SJC and TJC (based on 28-joint assessment range from 0 to 28, higher scores indicated worse condition), PtGA and PGA (score range from 0 to 10, assessed on 0-10 centimeter (cm) visual analog scale; higher scores indicated greater affection due to disease activity). CDAI total score = 0 (no disease) to 76 (severe disease), higher scores indicated worse condition. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved, observed in this study and who had completed 6-month follow up visit.

MCID improvement was assessed based on health assessment questionnaire (HAQ). HAQ: self-reported, valid assessment of functional disability in RA. Assessed based on ability of participants to perform daily activities in 8 categories: dressing, arising, eating, walking, reaching, gripping, hygiene, and conducting daily activities. Eight items were rated on a 4-point Likert scale from 0 to 3, where 0= without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Overall score was computed as sum of domain scores and divided by number of domains answered. Total score ranged from 0 to 3, where 0= least difficulty and 3= extreme difficulty, higher scores indicating worse functioning. Achievement of MCID for HAQ was defined as decrease in minimum of 0.22 units from baseline. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved, observed in this study and who had completed 6-month follow up visit.

HAQ: self-reported, valid assessment of functional disability in RA. The 20-question instrument assessed ability of participants to perform daily activities in 8 functional areas: dressing, arising, eating, walking, hygiene, reaching, griping, and conducting daily activities. Eight items were rated on a 4-point Likert scale from 0 to 3, where 0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, and 3 = unable to do. Overall score was computed as the sum of domain scores and divided by the number of domains answered. Total score ranged from 0 to 3, where 0 = least difficulty and 3 = extreme difficulty, higher scores indicating worse functioning. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved, observed in this study and who had completed 6-month follow up visit.

Pain VAS was assessed using 100 mm horizontal line to rate pain. Score ranged from 0 mm to 100 mm; where, 0 = no pain and 100 = worst possible pain. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved, observed in this study and who had completed 6-month follow up visit.

Participants assessed their fatigue using a 0 to 100 mm VAS scale, where 0 mm = no fatigue and 100 mm = worst possible fatigue. Index date was defined as the date of tofacitinib initiation at or after enrollment in the registry; initiation was defined as first ever use of tofacitinib.

Analysis population included all eligible participants whose medical records were retrieved, observed in this study and who had completed 6-month follow up visit.

Participants diagnosed with RA, enrolled in CorEvitas RA registry who initiated tofacitinib with a history of rituximab use on or after 06-Nov-2012 and with 6-month visit were included in this reporting group.