Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed.

Modified total Sharp x-ray score (mTSS) is a measure of change in joint health. Radiographs of hands/wrists and feet were obtained at screening and Week 52. Digitized images of these were scored in a blinded manner. Joints were scored for erosions from 0 (no damage) to 5 and for joint space narrowing from 0 (no damage) to 4; scores were added to obtain the mTSS (range = 0 [normal] to 398 [maximal disease]). Large positive change indicates disease progression; small positive/no change indicates slowing/halting of disease progression; and negative change may indicate improvement of disease.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Missing values were imputed via linear extrapolation from baseline using data collected at baseline and Week 24 or early termination.

Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed.

Modified total Sharp x-ray score (mTSS) is a measure of change in joint health. Radiographs of hands/wrists and feet were obtained at screening and Week 24. Digitized images of these were scored in a blinded manner. Joints were scored for erosions from 0 (no damage) to 5 and for joint space narrowing from 0 (no damage) to 4; scores were added to obtain the mTSS (range = 0 [normal] to 398 [maximal disease]). Large positive change indicates disease progression; small positive/no change indicates slowing/halting of disease progression; and negative change may indicate improvement of disease.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Missing values were imputed via linear extrapolation from baseline using data collected at baseline and Week 52.

Subjects 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. Subjects 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 indicated improvement.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. LOCF data analysis was used for missing values.

Subjects 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. Subjects 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 indicated improvement.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Last observation carried forward (LOCF) data analysis was used for missing values.

Subjects 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. Subjects 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). Responders had a >= 0.22-unit decrease (improvement) in HAQ scores from baseline to Week 12 or 24.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Subjects who were responders at Week 12 or 24 were evaluated to determine whether the response was maintained. LOCF data analysis was used for missing values.

Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Subjects who were ACR20 responders at Week 24 were evaluated to determine whether the response was maintained. Observed data were analyzed.

Patients were responders if they had: >= 70% improvement in tender joint count; >= 70% improvement in swollen joint count; and >= 70% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed.

Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed. The number of subjects meeting ACR20 response criteria for the first time at each time point is presented.

Patients were responders if they had: >= 50% improvement in tender joint count; >= 50% improvement in swollen joint count; and >= 50% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed. The number of subjects meeting ACR50 response criteria for the first time at each time point is presented.

Patients were responders if they had: >= 70% improvement in tender joint count; >= 70% improvement in swollen joint count; and >= 70% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein. Patients withdrawing early or receiving additional disease-modifying anti-rheumatic drugs (DMARDs) after Week 16 were non-responders.

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Observed data were analyzed. The number of subjects meeting ACR70 response criteria for the first time at each time point is presented.

Estimated yearly progression was defined as modified total Sharp x-ray score at baseline divided by duration of rheumatoid arthritis disease at baseline. Actual progression during the study was defined as modified total Sharp x-ray score at Week 52 minus modified total Sharp x-ray score at baseline divided by the duration of the study. The range of scores for the modified total Sharp x-ray score was 0 (normal) to 398 (maximal disease).

Full analysis set, defined as all subjects who were randomized and received at least one injection of study drug. Missing values were imputed via linear extrapolation from baseline.

Gender (female/male) recorded at Baseline for the Intent-to-Treat population (the Any Adalimumab Through Year 10 group) of the study. This measure was not included in the Baseline Characteristics section due to the difficulty of maintaining correct subject numbers and totals in that section.

Participants in the Any Adalimumab Through Year 10 group are intent-to-treat subjects.

Age recorded at Baseline, reported by category, for the Intent-to-Treat population (the Any Adalimumab Through Year 10 group) of the study. This measure was not included in the Baseline Characteristics section due to the difficulty of maintaining correct subject numbers and totals in that section.

Participants in the Any Adalimumab Through Year 10 group are intent-to-treat subjects.

Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed as observed (without imputation).

Patients were responders if they had: >= 20% improvement in tender joint count; >= 20% improvement in swollen joint count; and >= 20% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed using data as observed (without imputation).

Patients were responders if they had: >= 50% improvement in tender joint count; >= 50% improvement in swollen joint count; and >= 50% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed using data as observed (no imputation).

Patients were responders if they had: >= 50% improvement in tender joint count; >= 50% improvement in swollen joint count; and >= 50% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed using data as observed (no imputation).

Patients were responders if they had: >= 70% improvement in tender joint count; >= 70% improvement in swollen joint count; and >= 70% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed using data as observed (no imputation).

Patients were responders if they had: >= 70% improvement in tender joint count; >= 70% improvement in swollen joint count; and >= 70% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. All analyses were performed using data as observed (no imputation).

Patients were responders if they had: >=70% improvement in tender joint count; >=70% improvement in swollen joint count; and >=70% improvement in at least 3 of 5 remaining ACR core measures: patient assessment of pain; patient global assessment of disease activity; physician global assessment of disease activity; self-assessed disability (disability index of the Health Assessment Questionnaire [HAQ]); and acute phase reactant: C-reactive protein.

Participants analyzed were intent-to-treat subjects with non-missing response. Analyses were performed using data as observed (no imputation).

The Health Assessment Questionnaire (HAQ) Disability Index is a self-reported measure of disability, which assesses the patient's ability to perform the following tasks: dress and groom; arise; eat; walk; reach; grip; maintain hygiene; and maintain daily activity. Possible responses/scores are 0 (without any difficulty), 1 (with some difficulty), 2 (with much difficulty), and 3 (unable to do). Negative mean changes from Baseline indicate improvement. An improvement of 0.22 in score (a -0.22 or greater reduction from Baseline score) is a minimally clinically significant change.

Participants analyzed were intent-to-treat with non-missing response who remained in the study. Baseline was the last non-missing value prior to the first injection of adalimumab. Analyses were performed using data as observed (no imputation).

The Health Assessment Questionnaire (HAQ) Disability Index is a self-reported measure of disability, which assesses the patient's ability to perform the following tasks: dress and groom; arise; eat; walk; reach; grip; maintain hygiene; and maintain daily activity. Possible responses/scores are 0 (without any difficulty), 1 (with some difficulty), 2 (with much difficulty), and 3 (unable to do). Negative mean changes from Baseline indicate improvement. An improvement of 0.22 in score (a -0.22 or greater reduction from Baseline score) is a minimally clinically significant change.

Participants analyzed were intent-to-treat subjects with non-missing response who remained in the study. Baseline was the last non-missing value prior to the first injection of adalimumab. Analyses were performed using data as observed (no imputation).

Subjects 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. Subjects assessed their ability to do these tasks over the past week by marking their response on a questionnaire. Possible responses/scores were: 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 indicated improvement.

Participants analyzed were intent-to-treat subjects with non-missing change who remained in the study. Baseline was the last non-missing value prior to the first injection of adalimumab. Analyses were performed using data as observed (no imputation).

Subjects 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. Subjects assessed their ability to do these tasks over the past week by marking their response on a questionnaire. Possible responses/scores were: 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 indicated improvement.

Participants analyzed were intent-to-treat subjects with non-missing change who remained in the study. Baseline was the last non-missing value prior to the first injection of adalimumab. Analyses were performed using data as observed (no imputation).

Modified total Sharp x-ray score (mTSS) is a measure of change in joint health. Radiographs of hands/wrists and feet were obtained at screening and Week 416. Digitized images of these were scored in a blinded manner. Joints were scored for erosions from 0 (no damage) to 5 and for joint space narrowing from 0 (no damage) to 4; scores were added to obtain the mTSS (range = 0 [normal] to 398 [maximal disease]). Large positive change indicates disease progression; small positive/no change indicates slowing/halting of disease progression; and negative change may indicate improvement of disease.

Participants in each of the three groups were randomized subjects with non-missing radiographs who remained in the study. Baseline was defined as the value at the first visit. Analyses were performed using data as observed (no imputation).

Modified total Sharp x-ray score (mTSS) is a measure of change in joint health. Radiographs of hands/wrists and feet were obtained at screening and Week 520. Digitized images of these were scored in a blinded manner. Joints were scored for erosions from 0 (no damage) to 5 and for joint space narrowing from 0 (no damage) to 4; scores were added to obtain the mTSS (range = 0 [normal] to 398 [maximal disease]). Large positive change indicates disease progression; small positive/no change indicates slowing/halting of disease progression; and negative change may indicate improvement of disease.

Participants in each of the three groups were randomized subjects with non-missing radiographs who remained in the study. Baseline was defined as the value at the first visit. Analyses were performed using data as observed (no imputation).