Table 2 Association between waiting time and the change in BPI from baseline to the 6-month follow-up, for the overall sample and by main rheumatic condition
|  | BPI at baseline, Mean (SD) | BPI 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) | 3228 | 1946 | < 0.001 |  | < 0.001 |  |
 Total | 5.97 (2.13) | 5.20 (2.48) |  |  |  |  |
 <  2 months | 5.77 (2.24) | 4.61 (2.65) |  | −1.16 [− 1.45, − 0.87] |  | − 1.12 [− 1.42, − 0.81] |
 2–6 months | 6.12 (2.10) | 5.38 (2.39) |  | − 0.70 [− 0.91, − 0.48] |  | − 0.70 [− 0.93, − 0.48] |
 > 6 months | 6.00 (2.07) | 5.49 (2.34) |  | − 0.51 [− 0.69, − 0.32] |  | − 0.47 [− 0.66, − 0.28] |
Osteoarthritis (n) | 668 | 394 | Â | Â | Â | Â |
 Total | 5.71 (2.19) | 4.87 (2.59) | 0.004 |  | 0.033 |  |
 <  2 months | 5.73 (2.25) | 4.33 (2.68) |  | − 1.40 [− 2.12, − 0.68] |  | − 1.24 [− 2.02, − 0.46] |
 2–6 months | 5.82 (2.20) | 5.05 (2.56) |  | −0.63 [− 1.15, − 0.11] |  | − 0.66 [− 1.19, − 0.12] |
 > 6 months | 5.59 (2.13) | 5.15 (2.50) |  | − 0.40 [− 0.85, 0.042] |  | −0.40 [− 0.85, 0.05] |
Fibromyalgia (n) | 677 | 359 | Â | Â | Â | Â |
 Total | 6.13 (2.11) | 5.52 (2.40) | 0.003 |  | 0.002 |  |
 < 2 months | 6.21 (2.05) | 4.97 (2.44) |  | − 1.28 [− 1.98, −0.57] |  | − 1.30 [− 2.05, − 0.55] |
 2–6 months | 6.02 (2.20) | 5.31 (2.53) |  | −0.72 [− 1.20, − 0.24] |  | −0.76 [− 1.27, − 0.24] |
 > 6 months | 6.20 (2.06) | 6.02 (2.18) |  | − 0.35 [− 0.71, − 0.004] |  | −0.32 [− 0.65, 0.02] |