Table 4.
WPAI outcomes between two patient groups defined by the median for each health status outcome
| Function | Pain | Pt global estimate | Fatigue | PtGA | ||
| Percent work time missed | Better | 4.2 (19.0)‡ | 1.5 (7.2) | 2.0 (7.7)† | 3.9 (15.8)‡ | 1.6 (7.1) |
| Worse | 15.5 (31.5) | 16.3 (34.0) | 15.6 (33.9) | 14.5 (32.4) | 16.9 (34.6) | |
| Effect size | 0.46 | 0.61 | 0.55 | 0.43 | 0.63 | |
| Percent impairment while working | Better | 14.5 (18.8) | 11.6 (15.0) | 10.9 (13.1) | 12.8 (16.8) | 11.7 (14.3) |
| Worse | 39.1 (20.1) | 39.6 (21.1) | 40.0 (21.7) | 38.7 (21.0) | 41.2 (21.0) | |
| Effect size | 1.27 | 1.56 | 1.66 | 1.38 | 1.69 | |
| Percent overall work impairment | Better | 17.6 (24.8) | 12.2 (16.7) | 11.8 (15.7) | 14.8 (22.1) | 12.3 (16.1) |
| Worse | 46.5 (28.2) | 47.4 (30.0) | 47.2 (30.3) | 46.0 (28.9) | 48.9 (30.1) | |
| Effect size | 1.10 | 1.46 | 1.48 | 1.22 | 1.55 | |
| Percent activity impairment | Better | 19.0 (21.1) | 15.7 (17.0) | 15.1 (17.0) | 19.6 (21.0) | 17.5 (19.0) |
| Worse | 52.7 (23.3) | 51.9 (24.4) | 52.0 (23.7) | 49.9 (25.6) | 51.9 (24.5) | |
| Effect size | 1.53 | 1.73 | 1.79 | 1.30 | 1.58 | |
Pt global estimate, patient global estimate on health impact; PtGA, patient global assessment of disease activity
If not indicated, t test P values <0.001; †, t test P values <0.01; ‡, t test P values <0.05
Better status, ≤median; Worse status, >median. The median for each health status outcome was shown in Table 1