Special Investigation (Follow-up Survey of the Study of Adalimumab (D2E7) for Prevention of Joint Destruction in Patients With Rheumatoid Arthritis in Japan (M06-859 (NCT00870467))

The Disease Activity Score (DAS28) is a combined index used to measure disease activity in participants with rheumatoid arthritis. Calculation of the DAS28 score used the tender joint count (28 joints), swollen joint count (28 joints), patient's global assessment of disease activity, and the erythrocyte sedimentation rate (ESR). DAS 28 (ESR) scores range from 0 (no disease activity) to 9 (maximal disease activity); decrease is indicative of improvement in disease activity.

MMP-3 level in serum. Positive = >/= 121.0 ng/mL (male) and 59.7 ng/mL (female)

Modified Total Sharp Score (mTSS) is a method of assessing radiographs used in evaluation of inhibition of joint destruction of disease. Digitized X-rays of hands and feet were obtained, then scored in a blinded manner: for erosion (0 [no damage] to 5 [complete collapse or total destruction of joint]) and for joint space narrowing (0 [no damage] to 4 [complete luxation of joint]). Sum of scores was given as total mTSS (0 [normal] to 380 [maximal disease]). Large positive change in mTSS indicates disease progression; small positive/no change indicates slowing/halting of disease progression.

Participants assessed their ability to perform the following tasks: 1) dress/groom; 2) arise; 3) eat; 4) walk; 5) reach; 6) grip; 7) maintain hygiene; and 8) maintain daily activity. Participants assessed their ability to do these tasks over the past week by marking their response on a questionnaire. Possible responses/scores included the following: without any difficulty (0); with some difficulty (1); with much difficulty (2); and unable to do (3). Negative mean changes from baseline in the disability index of the HAQ-DI indicated improvement.

Adverse events (AEs) were collected from week 0 till the end of the study. Please see Adverse Event section below for more details.