| PCS at baseline, Mean (SD) | PCS at 6 months, Mean (SD) | GEE models | |||
---|---|---|---|---|---|---|
Unadj. p value a | Unadj. change from baseline to 6 months, EMM (95% CI) | Adj. p value a,b | Adj. change from baseline to 6 months, EMM b (95% CI) | |||
Overall sample (n) | 3210 | 1940 | < 0.001 |  | < 0.001 |  |
 Total | 23.5 (9.7) | 26.1 (11.2) |  |  |  |  |
 < 2 months | 24.3 (10.1) | 28.2 (12.3) |  | 3.8 [2.7, 4.9] |  | 3.9 [2.7, 5.1] |
 2–6 months | 23.2 (9.8) | 25.1 (10.6) |  | 1.6 [0.7, 2.4] |  | 1.6 [0.6, 2.5] |
 > 6 months | 23.0 (9.4) | 25.3 (10.6) |  | 1.9 [1.2, 2.6] |  | 2.0 [1.2, 2.8] |
Osteoarthritis (n) | 665 | 395 | 0.009 | Â | 0.057 | Â |
 Total | 24.7 (9.7) | 27.5 (11.2) |  |  |  |  |
 < 2 months | 24.1 (9.8) | 28.4 (11.4) |  | 4.7 [2.1, 7.3] |  | 4.3 [1.6, 7.0] |
 2–6 months | 24.6 (10.2) | 27.0 (11.5) |  | 1.7 [−0.4, 3.8] |  | 1.8 [−0.6, 4.2] |
 > 6 months | 25.3 (9.2) | 27.2 (10.7) |  | 1.7 [0.02, 3.34] |  | 1.9 [0.1, 3.8] |
Fibromyalgia (n) | 670 | 358 | 0.049 | Â | 0.038 | Â |
 Total | 22.7 (9.6) | 25.0 (11.0) |  |  |  |  |
 < 2 months | 22.7 (8.8) | 26.8 (11.7) |  | 4.4 [1.6, 7.2] |  | 4.7 [1.6, 7.8] |
 2–6 months | 23.8 (10.1) | 26.2 (11.3) |  | 2.7 [0.8, 4.5] |  | 2.3 [0.4, 4.3] |
 > 6 months | 21.6 (9.5) | 22.9 (9.9) |  | 1.6 [0.1, 3.1] |  | 1.5 [−0.1, 3.1] |