Table 2 Relationship between work‐related postures and new‐onset knee pain among newly appointed workers.
| New‐onset knee pain at 1 year | New‐onset knee pain at 2 years | Relative risk* (95% CI) | |||
|---|---|---|---|---|---|
| Yes | No | Yes | No | ||
| Sitting at work (last working day) | |||||
| None | 15 (6.9%) | 202 (93.1%) | 17 (11.0%) | 137 (89.0%) | 1.0 |
| <15 min | 1 (3.2%) | 30 (96.7%) | 3 (10.7%) | 25 (89.3%) | 0.9 (0.3 to 2.6) |
| >15 min | 36 (8.7%) | 378 (91.3%) | 32 (9.7%) | 297 (90.3%) | 1.1 (0.7 to 1.8) |
| Kneeling at work (last working day) | |||||
| None | 26 (6.4%) | 383 (93.6%) | 24 (8.4%) | 261 (91.6%) | 1.0 |
| <15 min | 19 (11.1%) | 152 (88.9%) | 17 (12.0%) | 125 (88.0%) | 1.5 (0.96 to 2.5) |
| >15 min | 10 (11.5%) | 77 (88.5%) | 11 (13.1%) | 73 (13.1%) | 1.4 (0.8 to 2.3) |
| Squatting at work (last working day) | |||||
| None | 27 (7.0%) | 356 (93.0%) | 25 (8.5%) | 270 (81.5%) | 1.0 |
| <15 min | 21 (11.0%) | 170 (89.0%) | 18 (12.2%) | 129 (87.8%) | 1.5 (0.9 to 2.3) |
| >15 min | 6 (7.5%) | 74 (92.5%) | 9 (13.0%) | 60 (87.0%) | 1.3 (0.6 to 2.1) |
| Standing at work (last working day) | |||||
| None | 4 (6.2%) | 61 (93.8%) | 7 (12.3%) | 50 (87.7%) | 1.0 |
| <15 min | 15 (8.1%) | 171 (71.9%) | 18 (10.3%) | 157 (89.7%) | 1.3 (0.7 to 2.6) |
| >15 min | 36 (8.6%) | 381 (91.4%) | 27 (9.7%) | 251 (90.3%) | 1.2 (0.6 to 2.3) |
| Bending forwards at work (last working day) | |||||
| None | 22 (7.3%) | 279 (92.7%) | 17 (7.0%) | 227 (93.0%) | 1.0 |
| <15 min | 18 (9.5%) | 172 (90.5%) | 19 (13.7%) | 120 (86.3%) | 1.5 (0.98 to 2.4) |
| >15 min | 15 (8.9%) | 153 (91.1%) | 16 (12.5%) | 112 (87.5%) | 1.4 (0.9 to 2.3) |
| Stretching below knee level (last working day) | |||||
| None | 21 (5.7%) | 346 (94.3%) | 21 (7.7%) | 253 (92.3%) | 1.0 |
| <15 min | 26 (11.4%) | 203 (88.6%) | 25 (13.7%) | 157 (86.3%) | 1.7 (1.1 to 2.6) |
| >15 min | 8 (11.4%) | 62 (88.6%) | 6 (10.9%) | 49 (89.1%) | 1.4 (0.7 to 2.7) |
*Adjusted for age, sex, occupational group, body mass index and physical activity.