Exposure variable | Scale | N | Mean | SD | P05 | P25 | Med | P75 | P95 | Minutes/day | R2 | |
Mean | SD | |||||||||||
Physical intensity | 6−20 | 26 821 | 9.80 | 3.20 | 6 | 7 | 9 | 12 | 15 | − | − | 0.39 |
Stand | 1−4 | 29 597 | 2.59 | 1.12 | 1 | 2 | 2 | 4 | 4 | 168 | 143 | 0.55 |
Repetition | 1−4 | 26 424 | 1.75 | 1.09 | 1 | 1 | 1 | 2 | 4 | 90 | 130 | 0.18 |
Change tasks | 1-−4 | 26 581 | 2.94 | 1.11 | 1 | 2 | 3 | 4 | 4 | 204 | 142 | 0.10 |
Rest eyes | 1−4 | 31 848 | 3.10 | 1.13 | 1 | 2 | 4 | 4 | 4 | 232 | 145 | 0.19 |
Kneel or squat | 1−4 | 29 574 | 1.58 | 0.91 | 1 | 1 | 1 | 2 | 4 | 62 | 101 | 0.39 |
Bend trunk | 1−4 | 30 853 | 1.66 | 0.97 | 1 | 1 | 1 | 2 | 4 | 70 | 107 | 0.35 |
Drive machinery | 1−4 | 29 385 | 1.10 | 0.46 | 1 | 1 | 1 | 1 | 2 | 15 | 51 | 0.27 |
Drive car or truck | 1−4 | 29 357 | 1.41 | 0.88 | 1 | 1 | 1 | 1 | 4 | 46 | 99 | 0.29 |
Handle objects 1–4 kg | 0−4 | 31 116 | 1.03 | 1.46 | 0 | 0 | 0 | 2 | 4 | 69 | 119 | 0.36 |
Handle objects >4 kg | 0−4 | 28 306 | 0.80 | 1.24 | 0 | 0 | 0 | 2 | 4 | 48 | 100 | 0.38 |
Carry loads <10 kg | 0−4 | 28 240 | 0.72 | 1.15 | 0 | 0 | 0 | 1 | 3 | 39 | 89 | 0.36 |
Carry loads 10–25 kg | 0−4 | 28 297 | 0.58 | 0.94 | 0 | 0 | 0 | 1 | 3 | 24 | 69 | 0.37 |
Carry loads >25 kg | 0−4 | 28 271 | 0.51 | 0.83 | 0 | 0 | 0 | 1 | 2 | 17 | 57 | 0.36 |
Use vibrating tools | 1-−4 | 28 437 | 1.11 | 0.47 | 1 | 1 | 1 | 1 | 2 | 17 | 55 | 0.30 |
Use computer screen | 1-−4 | 31 017 | 3.15 | 1.12 | 1 | 2 | 4 | 4 | 4 | 240 | 146 | 0.55 |
Use keyboard or scanner | 1−4 | 28 437 | 3.11 | 1.15 | 1 | 2 | 4 | 4 | 4 | 231 | 149 | 0.52 |
Bend neck | 1−4 | 32 048 | 2.45 | 1.11 | 1 | 1 | 3 | 3 | 4 | 149 | 133 | 0.08 |
Arms above shoulder | 1−4 | 32 712 | 1.39 | 0.73 | 1 | 1 | 1 | 2 | 3 | 38 | 74 | 0.23 |
Reach behind | 1−4 | 29 482 | 1.27 | 0.57 | 1 | 1 | 1 | 1 | 2 | 26 | 53 | 0.05 |
Arms abducted | 1−4 | 32 634 | 1.39 | 0.79 | 1 | 1 | 1 | 1 | 3 | 41 | 85 | 0.21 |
Bend elbow | 1−4 | 33 722 | 1.42 | 0.85 | 1 | 1 | 1 | 1 | 4 | 45 | 91 | 0.23 |
Rotate forearm | 1−4 | 32 647 | 1.22 | 0.62 | 1 | 1 | 1 | 1 | 3 | 25 | 66 | 0.30 |
Bend wrist | 1−4 | 32 599 | 1.36 | 0.79 | 1 | 1 | 1 | 1 | 3 | 40 | 87 | 0.22 |
Press base of hand | 1−4 | 33 127 | 1.14 | 0.49 | 1 | 1 | 1 | 1 | 2 | 17 | 51 | 0.23 |
Finger pinch | 1−4 | 33 128 | 1.45 | 0.88 | 1 | 1 | 1 | 1 | 4 | 48 | 97 | 0.13 |
Work outdoors | 1−4 | 35 187 | 1.38 | 0.78 | 1 | 1 | 1 | 1 | 3 | 38 | 81 | 0.31 |