Table 3.
Baseline variables predictive of WPAI:SHP subscales at 6 and 12 months in 1747 RA patients
| Predictor | Odds ratio (95% CI) | |
| Outcome: absenteeism | ||
| Fatigue | 1.23 (1.02 to 1.49) | |
| Age (years) | 1.20 (1.00 to 1.44) | |
| CRP | 0.82 (0.68 to 0.98) | |
| % work time missed due to RA (> 0 vs 0) | 4.75 (3.35 to 6.75) | |
| Visit 12 months vs 6 months | 1.10 (0.83 to 1.46) | |
| Predictor | Standardized beta-coefficient (β) (95% CI) | |
| Outcome: presenteeism | ||
| Fatigue | 3.44 (2.17 to 4.71) | |
| Age (years) | 1.44 (0.26 to 2.63) | |
| % impairment while working due to RA | 9.36 (7.96 to 10.76) | |
| % impairment at 12 months vs % impairment at 6 months | −1.98 (−3.39 to −0.58) | |
| Visit 12 months vs 6 months | −1.16 (−2.57 to 0.24) | |
| Outcome: Work productivity loss | ||
| Fatigue | 4.16 (2.47 to 5.85) | |
| % overall work impairment due to RA | 9.43 (7.74 to 11.12) | |
| Visit 12 months vs 6 months | −0.60 (−2.64 to 1.44) | |
| Outcome: Activity impairment | ||
| Fatigue | 1.52 (0.79 to 2.26) | |
| Male vs female | −1.83 (−3.33 to −0.33) | |
| Age (years) | 3.25 (2.61 to 3.90) | |
| % activity impairment due to RA | 9.41 (8.59 to 10.23) | |
| % activity impairment at 12 months vs % activity impairment at 6 months | −1.92 (−2.67 to −1.18) | |
| Anxiety/depression | Some vs none | 2.80 (1.40 to 4.20) |
| Extreme vs none | 5.81 (2.82 to 8.79) | |
| Visit 12 months vs 6 months | −2.36 (−3.10 to −1.61) | |
CI, confidence interval; CRP, C-reactive protein; RA, rheumatoid arthritis; WPAI:SHP, Work Productivity and Activity Impairment—Special Health Problems