Table 4 Association of effect sizes of the Health Assessment Questionnaire with duration of rheumatoid arthritis (all treatment arms).
| Models (R2)* | Variable | 3 month analysis | 6 month analysis | ||
|---|---|---|---|---|---|
| Parameter estimate (95% CI) | p Value | Parameter estimate (95% CI) | p Value | ||
| Adjusted for effect sizes of pain: n = 26 (3 months) and n = 47 (6 months) | |||||
| Unweighted (R2 = 0.45/0.46) | Pain (ES) | 0.60 (0.31 to 0.89) | <0.001 | 0.71 (0.48 to 0.95) | <0.001 |
| Duration (y) | −0.01 (−0.04 to 0.03) | 0.66 | −0.02 (−0.05 to 0) | 0.10 | |
| Weighted (R2 = 0.68/0.57) | Pain (ES) | 0.94 (0.65 to 1.23) | <0.001 | 0.79 (0.57 to 1.00) | <0.001 |
| Duration (y) | −0.02 (−0.06 to 0.01) | 0.13 | −0.03 (−0.05 to −0.01) | <0.01 | |
| Adjusted for effect sizes of tender joint counts: n = 27 (3 months) and n = 41 (6 months) | |||||
| Unweighted (R2 = 0.31/0.23) | TJC (ES) | 0.46 (0.17 to 0.75) | <0.01 | 0.39 (0.14 to 0.63) | <0.01 |
| Duration (y) | −0.01 (−0.03 to 0.02) | 0.63 | −0.01 (−0.04 to 0.01) | 0.33 | |
| Weighted (R2 = 0.53/0.32) | TJC (ES) | 0.67 (0.39 to 0.95) | <0.001 | 0.45 (0.21 to 0.69) | <0.001 |
| Duration (y) | −0.02 (−0.04 to −0.01) | <0.01 | −0.02 (−0.04 to −0.01) | 0.01 | |
*R2 values are given for the 3 months/6 months model.
CI, confidence interval; ES, effect size; TJC, tender joint count; y, years.