Unadjusted injury rates by physical demand and heat exposure category, psychological demand and job control tertile per 100 person-years
| First aid injury and MSD n=2060 | Serious injury, and MSD n=658 | First aid MSD only n=747 | Serious MSD only n=264 | |
|---|---|---|---|---|
| n (rate) | n (rate) | n (rate) | n (rate) | |
| Sedentary/light physical demand | 287 (10.28) | 92 (3.30) | 99 (3.55) | 36 (1.29) |
| Medium physical demand | 963 (13.34) | 275 (3.81) | 331 (4.58) | 94 (1.30) |
| Heavy/very heavy physical | 810 (15.52) | 291 (5.57) | 317 (6.07) | 134 (2.57) |
| Never exposed to heat | 492 (9.56) | 191 (3.71) | 142 (2.76) | 69 (1.34) |
| Exposed to heat <half the time | 1044 (13.43) | 317 (4.08) | 395 (5.08) | 141 (1.81) |
| Exposed to heat >half the time | 524 (22.67) | 150 (6.49) | 210 (9.09) | 54 (2.34) |
| Low psychological demand | 609 (11.92) | 192 (3.76) | 222 (5.01) | 77 (1.51) |
| Moderate psychological demand | 721 (13.64) | 224 (4.24) | 256 (4.82) | 96 (1.82) |
| High psychological demand | 730 (15.08) | 242 (5.00) | 269 (5.50) | 91 (1.88) |
| High job control | 614 (11.82) | 202 (3.89) | 233 (4.49) | 74 (1.43) |
| Moderate job control | 709 (15.33) | 195 (4.22) | 269 (5.82) | 85 (1.84) |
| Low job control | 737 (13.61) | 261 (4.82) | 245 (4.52) | 105 (1.94) |
MSD, musculoskeletal disorder.