Study Comparing The Effect On Disease Activity When Reducing Or Discontinuing Etanercept In Subjects With RA

Time to Treatment Failure (TTF)

TTF (in weeks): (date of failure minus date of randomization) divided by 7. Date of failure was ordinary visit date or extra visit date in case of failure (extra visit was within 2 weeks from the date a participant experienced significant disease progression between visits and wanted to withdraw from Period 2), or date of withdrawal due to disease progression. Participants who did not have a treatment failure were censored at their last evaluation visit. Participants who withdrew from the study prematurely and did not have a treatment failure were censored on the date of their withdrawal.

Time frame: Randomization (Week 0) up to date of failure, withdrawal due to disease progression or last evaluation visit (Week 48)

Percentage of Participants With Remission or Low Disease Activity (LDA)

Participants who had DAS28 less than or equal to (\<=) 3.2 were considered in remission or LDA state.

Time frame: Baseline (Week -8), Week -4, Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Percentage of Visits During Which Participants Were in Remission or Low Disease Activity State

Participants who had DAS28 \<=3.2 were considered in remission or LDA state. Percentage of visits during which a participant was in remission or LDA state was calculated as number of visits in which participant was in remission or LDA divided by total number of visits multiplied by 100.

Time frame: Randomization (Week 0) up to Week 48

Disease Activity Score Based on 28-Joint Count (DAS28) at Randomization

DAS28 calculated from the number of swollen joints (SJC) and painful joints (PJC) using the 28 joints count, the erythrocyte sedimentation rate (ESR) (millimeters per hour \[mm/hour\]) and patient's global assessment (PtGA) of disease activity (participant rated arthritis activity assessment with transformed scores ranging 0 to 10; higher scores indicated greater affectation due to disease activity). DAS28 \<=3.2 implied low disease activity, DAS28 \>3.2 to 5.1 = moderate to high disease activity and less than (\<) 2.6=remission.

Time frame: Randomization (Week 0)

Change From Randomization in Disease Activity Score Based on 28-Joint Count (DAS28) at Week 6, 12, 18, 24, 30, 36, 42, and 48

DAS28 calculated from SJC and PJC using the 28 joints count, the ESR (mm/hour) and PtGA of disease activity (participant rated arthritis activity assessment with transformed scores ranging 0 to 10; higher scores indicated greater affectation due to disease activity). DAS28 \<=3.2 = low disease activity, DAS28 \>3.2 to 5.1 = moderate to high disease activity and \<2.6=remission.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Tender Joints Count (TJC) at Week 6, 12, 18, 24, 30, 36, 42, and 48

Number of tender joints was determined by examining 28 joints and identified the joints that were painful under pressure or to passive motion. The number of tender joints was recorded on the joint assessment form at each visit, no tenderness = 0, tenderness = 1. A negative value in change from randomization indicates an improvement.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Swollen Joints Count (SJC) at Week 6, 12, 18, 24, 30, 36, 42, and 48

Number of swollen joints was determined by examination of 28 joints and identifying when swelling was present. The number of swollen joints was recorded on the joint assessment form at each visit, no swelling = 0, swelling =1. A negative value in change from randomization indicates an improvement.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Physician Global Assessment (PGA) of Disease Activity at Week 6, 12, 18, 24, 30, 36, 42, and 48

PGA of disease activity was measured on a 0 to 100 millimeter (mm) Visual Analog Scale (VAS), with 0 mm = no disease activity and 100 mm = extreme disease activity.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Participant Global Assessment (PtGA) of Disease Activity at Week 6, 12, 18, 24, 30, 36, 42, and 48

Participants assessed the overall activity of their rheumatoid arthritis (RA) on a 0 to 100 mm VAS, where 0 mm = no disease activity and 100 mm = extreme disease activity.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Participant General Health Visual Analog Scale (VAS) at Randomization

Participants answered "in general how would you rate your health over the last 2-3 weeks?" Participants responded by using a 0 to 100 mm VAS, where 0 mm = very well and 100 mm = extremely bad.

Time frame: Randomization (Week 0)

Change From Randomization in Participant General Health Visual Analog Scale (VAS) at Week 6, 12, 18, 24, 30, 36, 42, and 48

Participants answered "in general how would you rate your health over the last 2-3 weeks?" Participants responded by using a 0 to 100 mm VAS, where 0 mm = very well and 100 mm = extremely bad.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Participant Pain Visual Analog Scale (VAS) at Randomization

Participants indicated the amount of pain experience during the last 2-3 days by marking a vertical line on 100 mm VAS. Intensity of pain range: 0 = no pain to 100 = pain as bad as it could be.

Time frame: Randomization (Week 0)

Change From Randomization in Participant Pain Visual Analog Scale (VAS) at Week 6, 12, 18, 24, 30, 36, 42, and 48

Participants indicated the amount of pain experience during the last 2-3 days by marking a vertical line on 100 mm VAS. Intensity of pain range: 0 = no pain to 100 = pain as bad as it could be.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Morning Stiffness Duration at Week 6, 12, 18, 24, 30, 36, 42, and 48

Duration of morning stiffness: Time elapsed when participant woke up in morning and was able to resume normal activities without stiffness in minutes. The duration of morning stiffness was determined by asking the following questions: 1) Over the last 2 days, when did you wake in the morning? 2) Over the last 2 days, when were you able to resume your normal activities without stiffness? Increase in stiffness duration from randomization represented disease progression and/or joint worsening, no change represented halting of disease progression, and a decrease represented improvement.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Erythrocyte Sedimentation Rate (ESR) at Week 6, 12, 18, 24, 30, 36, 42, and 48

ESR is a laboratory test that provides a non-specific measure of inflammation. The test assesses the rate at which red blood cells fall in a test tube. Normal range is 0-30 millimeter per hour (mm/hour). A higher rate is consistent with inflammation.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in C-Reactive Protein (CRP) Level at Week 6, 12, 18, 24, 30, 36, 42, and 48

The test for CRP is a laboratory measurement for evaluation of an acute phase reactant of inflammation through the use of an ultrasensitive assay. Normal range of CRP is \<10 milligram per liter (mg/L). A decrease in the level of CRP indicates reduction in inflammation and therefore improvement.

Time frame: Randomization (Week 0), Week 6, 12, 18, 24, 30, 36, 42, 48

Change From Randomization in Modified Total Sharp Score (mTSS) at Week 48

mTSS = sum of erosion and Joint Space Narrowing (JSN) scores for 44 joints (16 per hand and 6 per foot). mTSS scores ranged from 0 (normal) to 448 (worst possible total score). Change: scores at observation minus score at randomization. An increase in mTSS from randomization represented disease progression and/or joint worsening, no change represented halting of disease progression, and a decrease represented improvement.

Time frame: Randomization (Week 0), Week 48

Magnetic Resonance Imaging (MRI) Findings at Randomization

MRI of hand/wrist of dominant hand scored for signs of synovitis (S-score), bone edema(O-score), bone erosions (E-score) as per outcome measures in RA clinical trials (OMERACT). S-score:0(normal)-3(severe) for distal radioulnar,radiocarpal,intercarpal-carpometacarpal,second-fifth metacarpophalangeal joints, total score(TS)0-21, higher score(HS)=severe synovitis. O-score:0(no volume increment)-3(100% volume increment) in 23 hand/wrist joints, TS 0-69, HS=more edema. E-score:0(no volume occupied by erosion)-10(100% volume occupied by erosion) in 23 hand/wrist joints, TS 0-230, HS=more erosion.

Time frame: Randomization (Week 0)

Change From Randomization in Magnetic Resonance Imaging (MRI) Findings (S-Score) at Week 12

MRI of hand/wrist of dominant hand was scored for signs of synovitis (S-score), bone edema (O-score), and bone erosions (E-score) as per OMERACT. S-score: 0 (normal) to 3 (severe) for each of distal radioulnar, radiocarpal, intercarpal-carpometacarpal, second to fifth metacarpophalangeal joints; total score 0 to 21, higher score=severe synovitis.

Time frame: Randomization (Week 0), Week 12

Change From Randomization in Magnetic Resonance Imaging (MRI) Findings (O-Score, E-Score) at Week 12

MRI of hand/wrist of dominant hand was scored for signs of synovitis (S-score), bone edema (O-score), and bone erosions (E-score) as per OMERACT. O-score: 0 (no volume increment) to 3 (100% volume increment) in 23 hand/wrist joints; total score 0 to 69, higher scores=more edema. E-score: 0 (no volume occupied by erosion) to 10 (100% volume occupied by erosion) in 23 hand/wrist joints; total score 0 to 230, higher scores=more erosion.

Time frame: Randomization (Week 0), Week 12

Percentage of Participants in Treatment Failure for Each Potentially Predictor Variable at Randomization

Percentage of participants who were treatment failure over 48 weeks as per potentially predictor variables (at randomization) are reported: number of swollen joints/tender joints, DAS28, PGA, PtGA, participant general health VAS, participant pain VAS, clinical disease activity index (CDAI), simplified disease activity index (SDAI), ESR (mm/hour), plasma CRP (mg/L), sensitive serum CRP (mg/L), anti- cyclic citrullinated peptide (anti CCP, units/mL), cartilage oligomeric matrix protein (COMP, units/liter), S-score, O-score, E-score, Joint space narrowing score, erosion score, and mTSS.

Time frame: Randomization (Week 0) up to Week 48