Risk of incident neck/shoulder pain according to previous history of musculoskeletal pain at baseline
| Previous musculoskeletal pain | Number of nurses* | Cases of neck/shoulder pain during follow up Number (%) | Hazard ratio† (95% CI) |
|---|---|---|---|
| *Data were missing for up to 36 nurses. | |||
| †Adjusted for age, BMI, and frequently feeling tired, low, tense, or under stress. | |||
| Neck/shoulder pain | |||
| Interval since last neck pain | |||
| Never | 355 | 99 (28) | 1 |
| >1 year ago at baseline | 101 | 42 (42) | 1.6 (1.1 to 2.3) |
| Within the past year at baseline | 99 | 54 (55) | 2.8 (2.0 to 3.9) |
| ptrend<0.001 | |||
| Total duration of previous neck pain | |||
| Never | 355 | 99 (28) | 1 |
| <1 week | 80 | 31 (39) | 1.7 (1.1 to 2.5) |
| 1–4 weeks | 64 | 35 (55) | 2.3 (1.5 to 3.3) |
| >4 weeks | 55 | 29 (53) | 2.6 (1.7 to 4.0) |
| ptrend<0.001 | |||
| >4 weeks and pain within past year (compared to never had pain) | 29 | 16 (55) | 3.3 (1.9 to 5.8) |
| Low back pain | |||
| Interval since last back pain | |||
| Never | 222 | 54 (24) | 1 |
| >1 year ago at baseline | 111 | 46 (41) | 1.8 (1.2 to 2.7) |
| Within the past year at baseline | 221 | 95 (43) | 1.9 (1.4 to 2.7) |
| ptrend<0.001 | |||
| Total duration of previous back pain | |||
| Never | 222 | 54 (24) | 1 |
| <1 week | 76 | 25 (33) | 1.4 (0.9 to 2.3) |
| 1–4 weeks | 109 | 46 (42) | 1.8 (1.2 to 2.7) |
| >4 weeks | 144 | 70 (49) | 2.3 (1.6 to 3.3) |
| ptrend<0.001 | |||
| >4 weeks and pain within past year (compared to never had pain) | 107 | 55 (51) | 2.6 (1.8 to 3.9) |