Arm–wrist–hand | Neck–shoulder | |||
Exposure variable | Univariate RR (95% CI) | Multivariate* RR (95% CI) | Univariate RR (95% CI) | Multivariate† RR (95% CI) |
Self-reported duration of total computer use at work, h/day | ||||
0 to <4 | 1 | 1 | 1 | 1 |
4 to <6 | 1.4 (0.9 to 2.2) | 1.9 (1.1 to 3.1) | 1.3 (0.9 to 1.7) | 1.1 (0.8 to 1.5) |
≥6 | 2.0 (1.3 to 3.0) | 2.0 (1.2 to 3.2) | 1.7 (1.3 to 2.3) | 1.2 (0.9 to 1.6) |
Self-reported duration of mouse use at work, h/day | ||||
0 to <2 | 1 | 1 | 1 | 1 |
2 to <4 | 0.9 (0.6 to 1.4) | 1.1 (0.7 to 1.7) | 1.0 (0.7 to 1.3) | 1.1 (0.8 to 1.5) |
≥4 | 1.5 (1.0 to 2.2) | 1.4 (0.9 to 2.1) | 1.6 (1.2 to 2.2) | 1.5 (1.1 to 2.0) |
Recorded duration of total computer use at work, h/week | ||||
1 to <10 | 1 | 1 | 1 | 1 |
10 to <14 | 1.0 (0.7 to 1.4) | 1.0 (0.7 to 1.5) | 1.0 (0.7 to 1.4) | 1.2 (0.8 to 1.6) |
14 to 36 | 0.9 (0.6 to 1.4) | 0.9 (0.6 to 1.4) | 0.8 (0.5 to 1.1) | 0.8 (0.6 to 1.1) |
Recorded duration of mouse use at work, h/week | ||||
0 to <5 | 1 | 1 | 1 | 1 |
5 to <7 | 0.8 (0.5 to 1.2) | 0.8 (0.6 to 1.2) | 0.8 (0.6 to 1.1) | 0.8 (0.6 to 1.1) |
7 to 22 | 0.9 (0.6 to 1.3) | 0.9 (0.6 to 1.3) | 0.8 (0.5 to 1.1) | 0.8 (0.6 to 1.1) |
Recorded duration of keyboard use at work, h/week | ||||
0 to <2 | 1 | 1 | 1 | 1 |
2 to 3 | 0.8 (0.6 to 1.2) | 1.0 (0.7 to 1.4) | 0.9 (0.6 to 1.2) | 1.1 (0.8 to 1.6) |
3 to 13 | 0.7 (0.5 to 1.1) | 0.7 (0.5 to 1.1) | 0.8 (0.5 to 1.1) | 1.0 (0.7 to 1.4) |
↵* Self-reported duration of total computer use at work (10 310 observations) and self-reported duration of mouse use at work (10 307 observations) were adjusted for factor no 1 (see appendix 1) until 6, 12, 13, 15, 27, 30, 35. Recorded duration of total computer use at work (3958 observations) and recorded duration of keyboard use at work (3956 observations) were adjusted for no 2, 5, 6, 8, 9, 12, 13, 15, and recorded duration of mouse use at work (3956 observations): adjusted for no 2, 5, 6, 8, 9, 12, 13, 15 and 30.
↵† Self-reported duration of total computer use at work (10 959 observations) was adjusted for factor no 1 (see appendix 1) until 3, 6, 14 until 16, 24, 27, 31 and 42. Self-reported duration of mouse use at work (10 987 observations) was adjusted for no 1, 2, 6, 14, 24, 27, 31, 42. Recorded duration of total computer use at work (3940 observations) was adjusted for no 1 until 3, 6, 10, 13 until 16, 30, 42, recorded duration of mouse use at work (4134 observations) was adjusted for no 1, 2, 6, 10, 11, 14, 15, 30, 42, and recorded duration of keyboard use at work (4125 observations) was adjusted for no 1, 2, 6, 10, 11, 14 until 16, 30, 42.
RR, rate ratio.