Stratification | Unadjusted B (95% CI) | Adjusted1 B (95% CI) |
---|---|---|
1. All individuals with LBP (n = 802) | 0.16 (0.09–0.24), P < 0.001 | 0.14 (0.05–0.22), P = 0.001 |
2. Mental distress (HSCL-25) | ||
No (n = 631) | 0.19 (0.10–0.27), P < 0.001 | 0.16 (0.07–0.26), P < 0.001 |
Yes (n = 171) | 0.09 (−0.09–0.26), P = 0.343 | 0.05 (−0.15–0.25), P = 0.619 |
3. Number of pain sites | ||
< 2 (n = 401) | 0.14 (0.03–0.24), P = 0.009 | 0.11 (0.00–0.23), P = 0.050 |
≥ 2 (n = 401) | 0.19 (0.08–0.29), P < 0.001 | 0.16 (0.03–0.28), P = 0.014 |
4. Mental distress (HSCL-25) and pain sites combined | ||
No mental distress and < 2 pain sites (n = 333) | 0.17 (0.06–0.28), P = 0.002 | 0.14 (0.02–0.26), P = 0.026 |
No mental distress and ≥ 2 pain sites (n = 298) | 0.20 (0.09–0.32), P < 0.001 | 0.18 (0.03–0.32), P = 0.016 |
Mental distress and < 2 pain sites (n = 68) | −0.06 (−0.34–0.23), P = 0.691 | −0.03 (−0.38–0.31), P = 0.841 |
Mental distress and ≥ 2 pain sites (n = 103) | 0.15 (−0.08–0.38), P = 0.188 | 0.08 (−0.18–0.34), P = 0.540 |