Fixed-effect models of Disease Activity Score-28 (DAS28) and patient global on fatigue in RA and of patient global in OA. Values are adjusted for age and sex. The robust Huber/White/sandwich estimator is used. RA models are based on data from PENN and ARCK, a mean of 3.6 observations per patient during a mean of 0.92 years. OA models are based on data from PENN, ARCK, NDB, and WAC, a mean of 7.7 observations per patient over a mean of 4.0 years.
| Model | Condition | Predictor | Patients, no. (Observations) | Coefficient (95% CI) |
|---|---|---|---|---|
| 1 | RA | DAS28 | 947 (3416) | 0.54 (0.45, 0.63) |
| 2 | RA | Patient global | 1124 (6962) | 0.46 (0.42, 0.50) |
| 3 | OA | Patient global | 3946 (30,673) | 0.38 (0.37, 0.40) |