Characteristics of subjects, by disease status (low back pain, neck/shoulder pain and low back pain, and neck/shoulder pain
| Characteristics | Controls | LBP | NSP | LBP and NSP |
|---|---|---|---|---|
| LBP, low back pain; NSP, neck/shoulder pain; LBP and NSP, low back pain and neck/shoulder pain. | ||||
| Women (n) | 984 | 390 | 251 | 63 |
| Men (n) | 716 | 319 | 101 | 24 |
| Total (n) | 1700 | 709 | 352 | 87 |
| Mean age (years) | 40 | 40 | 39 | 40 |
| Blue-collar workers (%) | 58 | 63 | 57 | 74 |
| Job strain (%) | 4 | 6 | 7 | 9 |
| Earlier episodes of LBP or NSP (%) | 45 | 70 | 70 | 84 |
| Depression, treated for now or earlier (%) | 5 | 6 | 7 | 15 |