Descriptive information and the distribution of the four variables related to physical exposure at work calculated from the video recordings of the workers included in the analyses (n=977)
| Variable | Classification |
Distribution n (%) Men |
Distribution n (%) Women |
Distribution n (%) Total | |
| Sex | 737 (74.4) | 240 (25.6) | 977 (100) | ||
| Age (y)1-150 1-151 | 36.8 (8.1) | 32.1 (8.8) | 35.7 (8.5) | ||
| Nationality1-150 | Dutch | 721 (97.8) | 228 (95.0) | 949 (97.1) | |
| Employment in current job (y)1-150 1-151 | 10.5 (8.1) | 6.7 (5.1) | 9.6 (7.7) | ||
| Work (h/week)1-150 1-151 | 39.2 (3.4) | 35.3 (6.5) | 38.2 (4.7) | ||
| Working time with neck at ⩾20° of flexion (%)1-150 1-152 | <60 | 683 (95.9) | 191 (80.9) | 874 (92.2) | |
| 60–70 | 23 (3.2) | 22 (9.3) | 45 (4.7) | ||
| >70 | 6 (0.8) | 23 (9.7) | 29 (3.1) | ||
| Working time with neck at ⩾45° of flexion (%)1-150 1-152 | <5 | 547 (76.8) | 154 (65.3) | 701 (71.8) | |
| 5–10 | 135 (19.0) | 38 (16.1) | 173 (17.7) | ||
| >10 | 30 (4.2) | 44 (18.6) | 74 (7.6) | ||
| Working time with neck at ⩾45° of rotation (%)1-152 | <20 | 609 (85.5) | 211 (89.4) | 820 (86.5) | |
| 20–30 | 64 (9.0) | 15 (6.4) | 79 (8.3) | ||
| >30 | 39(5.5) | 10 (4.2) | 49 (5.2) | ||
| Working time in a sitting position (%)1-150 1-152 | <1 | 209 (29.4) | 18 (7.6) | 227 (23.9) | |
| 1–50 | 288 (40.4) | 101 (42.8) | 389 (41.0) | ||
| 50–75 | 23 (3.2) | 22 (9.2) | 45 (4.7) | ||
| 75–95 | 152 (20.6) | 69 (29.2) | 221 (23.3) | ||
| >95 | 40 (5.6) | 26 (11.0) | 66 (7.0) | ||