A Retrospective, Observational Chart Review of Biologics in Monotherapy Versus the Combination Biologic Plus Methotrexate in Patients With Rheumatoid Arthritis

The DAS28 score is a measure of the participant's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], participant's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. DAS28 equals (=) (0.56 multiplied by [*] the square root [√] of TJC) plus (+) (0.28 * √ of SJC) + (0.70 * the natural logarithm [ln] ESR in millimeters per hour [mm/h]) + (0.014 * participant's global assessment of disease activity). DAS28 Remission is defined as a DAS28 score <2.6.

The DAS28 score is a measure of the participant's disease activity calculated using the TJC [28 joints], SJC [28 joints], participant's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the ESR for a total possible score of 0 to approximately 10. DAS28 = (0.56 * √ of TJC) + (0.28 * √ of SJC) + (0.70 * ln ESR in mm/h) + (0.014 * participant's global assessment of disease activity). DAS28 Remission is defined as a DAS28 score < 2.6.

The DAS28 score is a measure of the participant's disease activity calculated using the TJC [28 joints], SJC [28 joints], participant's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the ESR for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score <2.6. LDA was defined as a DAS28 score <3.2.

The DAS28 score is a measure of the participant's disease activity calculated using the TJC [28 joints], SJC [28 joints], participant's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and either ESR or C Reactive Protein (CRP) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score <2.6.

The DAS28 score is a measure of the participant's disease activity calculated using the TJC [28 joints], SJC [28 joints], participant's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and either ESR or CRP for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score <2.6.

Drug retention was defined as the total duration of time in months the participant was on treatment (combination therapy or monotherapy). The duration was the time in months between the start date of biologic therapy to the date of most recent visit.

The 28 joints to be assessed for tenderness were shoulder, elbow, wrist, metacarpophalangeal (MCP) joints 1-5, proximal interphalangeal (PIP) joints 1-5, and knee on both sides of the body. The sum of tender joints ranged from 0 to 28 with 0 as best possible health status and 28 as worst health status.

The 28 joints to be assessed for swelling were shoulder, elbow, wrist, MCP joints 1-5, PIP joints 1-5, and knee on both sides of the body. The sum of swollen joints, each, ranged from 0 to 28 with 0 as best possible health status and 28 as worst health status.