Biomechanical exposure scores and the RR for RNE decompression surgery (n=92) in exposed versus unexposed workers
| Factor | N | Person-years | Cases | IR | RR | 95% CI |
| Grip Score | ||||||
| Unexposed (4) | 48 746 | 612 804 | 12 | 1.96 | 1 | – |
| Exposed (5–12) | 180 961 | 2 286 525 | 80 | 3.50 | 1.79 | 0.97 to 3.28 |
| Vibration Score | ||||||
| Unexposed (2) | 104 469 | 1 314 283 | 33 | 2.51 | 1 | |
| Exposed (3–6) | 125 238 | 1 585 046 | 59 | 3.72 | 1.47 | 1.08 to 2.00 |
| Repetitive Flexion and Extension Score | ||||||
| Unexposed (2) | 81 005 | 1 019 711 | 27 | 2.65 | 1 | – |
| Exposed (3–6) | 148 702 | 1 879 618 | 65 | 3.46 | 1.31 | 0.83 to 2.05 |
| Static Work and Elbow Leaning Score | ||||||
| Unexposed (2) | 68 712 | 866 097 | 22 | 2.54 | 1 | – |
| Exposed (3–6) | 160 995 | 2 033 232 | 70 | 3.44 | 1.36 | 0.84 to 2.19 |
Models adjusted for individual factors: BMI, smoking, age, and time of surgery.
Exposure sum score ranges given in parentheses. Exposure score definitions are given in equations (1)–(4).
BMI, body mass index; IR, incidence rate per 100 000 person-years; N, number workers; RNE, radial nerve entrapment; RR, relative risk.