Observational Study to Determine How Physicians Make Treatment Decisions in Patients Treated With Tofacitinib for Moderate to Severe Active Rheumatoid Arthritis

Time to first step-up treatment escalation was defined for participants who experienced a treatment step-up and was measured as date of first treatment step up escalation minus (-) date of first prescription of tofacitinib. Treatment step-up was defined as an increase from the current treatment regime (monotherapy) towards a combination of DMARDs.

SDAI was calculated using the following formula: SDAI = Tender Joint Count (TJC) (using 28 joints) + Swollen Joint Count (SJC) (using 28 joints) + Patient Global Assessment of Arthritis (PtGA) (0-10 centimetre [cm] scale) + Physician's Global Assessment of Arthritis (PhGA) (0-10 cm scale) + C-reactive protein (CRP) (milligram per decilitre [mg/dL]). TJC28 joints included shoulders, elbows, wrists, metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints, and knees whereas SJC28 included shoulders, elbows, wrists, MCP, PIP and knees (excluding artificial joints). PtGA and PhGA both were assessed on 0-10 cm visual analogue scale (VAS) scale (0 cm [very well] to 10 cm [worst], where higher scores indicated greater affliction due to disease activity). SDAI total score ranged from 0 to 86, where higher scores indicated higher disease activity. SDAI score of less than or equal to (<=11) indicates LDA.

CDAI was calculated using the following formula: CDAI = (28TJC) + (28SJC) + (PhyGA in cm) + (PtGA in cm). TJC28 joints included shoulders, elbows, wrists, MCP and proximal PIP joints, and knees whereas SJC28 included shoulders, elbows, wrists, MCP, PIP and knees (excluding artificial joints). PtGA and PhGA both were assessed on 0-10 cm VAS scale (0 cm [very well] to 10 cm [worst], where higher scores indicated greater affliction due to disease activity). CDAI total score ranged from 0 to 76, where higher scores indicated higher disease activity. CDAI score of <= 10 indicates LDA.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (ESR) was calculated using the following formula: 0.56* square root of (TJC28) + 0.28* square root of (SJC28) + 0.70* natural log (ln) (ESR in [millimeter per hour [mm/ hour]) + 0.014*(PtGA in cm). PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (ESR) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity. DAS28-4 ESR <= 3.2 indicates LDA.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (CRP) was calculated using the following formula: 0.56* square root of (TJC28) + 0.28* square root of (SJC28) + 0.36*ln (CRP in mg/l +1) + 0.014*(PtGA in mm)+ 0.96. PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (CRP) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity. DAS28-4 CRP <= 3.2 indicates LDA.

ACR-EULAR Boolean remission criteria was defined as when participant had ACR remission =1 if; TJC28 <=1, SJC28 <=1, CRP <=1mg/dL and PtGA <= 2 cm on a 0 to 10 cm scale, where higher values indicate greater affection due to disease activity.

SDAI was calculated using the following formula: SDAI = (TJC28) + (SJC28) + (PtGA in cm) + (PhGA in cm) + (CRP in mg/dL). TJC28 joints included shoulders, elbows, wrists, MCP and PIP joints, and knees whereas SJC28 included shoulders, elbows, wrists, MCP, PIP and knees (excluding artificial joints). PtGA and PhGA both were assessed on 0-10 cm VAS scale (0 cm [very well] to 10 cm [worst], where higher scores indicated greater affliction due to disease activity). SDAI total score ranged from 0 to 86, where higher scores indicated higher disease activity. SDAI score of <=3.3 indicates remission.

CDAI was calculated using the following formula: CDAI = (28TJC) + (28SJC) + (PhyGA in cm) + (PtGA in cm). TJC28 joints included shoulders, elbows, wrists, MCP and proximal PIP joints, and knees whereas SJC28 included shoulders, elbows, wrists, MCP, PIP and knees (excluding artificial joints). PtGA and PhGA both were assessed on 0-10 cm VAS scale (0 cm [very well] to 10 cm [worst], where higher scores indicated greater affliction due to disease activity). CDAI total score ranged from 0 to 76, where higher scores indicated higher disease activity. CDAI score of <=2.8 indicates remission.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (ESR) was calculated using the following formula: 0.56*square root of (TJC28) + 0.28*square root of (SJC28) + 0.70*In (ESR in mm/ hour) + 0.014*PtGA in cm. PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (ESR) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity. DAS28-4 ESR score of <2.6 indicates remission.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (CRP) was calculated using the following formula: 0.56*square root of (TJC28) + 0.28*square root of (SJC28) + 0.36*ln (CRP in mg/l +1) + 0.014*(PtGA in cm)+ 0.96. PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (CRP) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity. DAS28-4 CRP score of <2.6 indicates remission.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (ESR) was calculated using the following formula: 0.56*square root of (TJC28) + 0.28*square root of (SJC28) + 0.70*In (ESR in mm/ hour) + 0.014*PtGA in cm. PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (ESR) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity.

DAS28 is a measure of disease activity in participants with rheumatoid arthritis. DAS28-4 (CRP) was calculated using the following formula: 0.56*square root of(TJC28) + 0.28*square root of(SJC28) + 0.36*ln (CRP in mg/l +1) + 0.014*(PtGA in cm)+ 0.96. PtGA was assessed on 0-10 cm VAS scale (scores ranging from 0 cm [very well] to 10 cm [worst]), where higher scores indicated greater affliction due to disease activity). Total DAS28-4 (CRP) score range: 0 (none) to 9.4 (extreme disease activity), higher score indicated more disease activity.

The duration of morning stiffness was determined by asking the following questions: "When you wake up in the morning, do you currently suffer from morning stiffness?" "How long does the morning stiffness last from the time you wake up?". The change from baseline in duration of morning stiffness was calculated as: morning stiffness at time point -morning stiffness at baseline.

The FFbH for RA is a German short questionnaire for the assessment of patientive functional capacity in the context of basic everyday activities (range: 0-100% functional capacity, where higher percentage indicates more capacity for everyday activities). The FFbH questionnaire consisted of 18 questions with 3 possible responses (Yes; Yes, but with effort; No or only with outside help). The total score was the sum of the scores of all 18 questions, where for each question (Yes = 2 points; Yes, but with effort = 1 point; No or only with outside help = 0 points).The functional capacity (%) is calculated by (total score*100) divided by (2*number of valid responses). The change from baseline was calculated at each time point as functional capacity at timepoint - functional capacity at baseline.

The FFbH for RA is a German short questionnaire for the assessment of patientive functional capacity in the context of basic everyday activities (range: 0-100% functional capacity, where higher percentage indicates more capacity for everyday activities). The FFbH questionnaire consisted of 18 questions with 3 possible responses (Yes; Yes, but with effort; No or only with outside help). The total score was the sum of the scores of all 18 questions, where for each question (Yes = 2 points; Yes, but with effort = 1 point; No or only with outside help = 0 points). The functional capacity [%] is calculated by (total score*100)/ (2*number of valid responses). Functional remission in FFbH was defined as functional capacity > 83 %.

The EQ-5D-3L is a standardised instrument used to measure quality of life. It is based on five dimensions: mobility, self-care, usual activities, pain and discomfort, and anxiety and depression with each dimension having three levels of function: 1 indicates no problem; 2 indicates some problem; 3 indicates extreme problem. Scoring formula developed by EuroQol Group (German weights) assigns a utility value for each domain in the profile. Score was transformed and results in a total score range of 0.05 to 1.00; higher scores indicating a better health state.

The FACIT-F Scale is a participant completed questionnaire consisting of 13 items that assess fatigue. Participants responded to each item on a 5-point scale based on their experience of fatigue during the past 7 days (0 = not at all; 1 = a little bit; 2 =somewhat; 3 = quite a bit; 4 = very much). Instrument scoring yielded a range from 0 to 52 (negatively worded items were reversed during analysis), with higher scores representing better participant status (less fatigue).

Drug survival was assessed using Kaplan-Meier methodology. For participants who terminated tofacitinib, the drug survival status was recorded as (status = 1 and time = termination date tofacitinib - date of initiation on tofacitinib) and for participants who do not terminate tofacitinib (status = 0 and time = date of final visit - date of initiation on tofacitinib.

Satisfaction with treatment was assessed on a 5-point Likert scale (where 0 = extremely dissatisfied, 1= dissatisfied, 2 = neither satisfied nor dissatisfied, 3 = satisfied and 4 = extremely satisfied) in response to the question "How satisfied are you with the drugs that you have received for your arthritis since your last visit?".