Baseline characteristics by occupational physical activity for participants in the Nord-Trøndelag Health Study 1995–1997 (HUNT2)
| Occupational physical activity | ||||
| Mostly sedentary | Much walking | Much walking and lifting | Heavy physical work | |
| Persons (n) | 9690 | 9916 | 8837 | 3919 |
| Mean age, years (SD) | 41.7 (10.7) | 42.0 (10.9) | 39.7 (10.8) | 41.1 (10.9) |
| Mean BMI, kg/m2 (SD) | 26.0 (3.3) | 25.8 (3.8) | 25.9 (3.9) | 26.4 (3.5) |
| Mean HADS anxiety (SD) | 4.1 (3.1) | 4.2 (3.1) | 4.2 (3.2) | 4.1 (3.1) |
| Mean HADS depression (SD) | 2.9 (2.8) | 2.9 (2.7) | 3.0 (2.7) | 3.5 (3.0) |
| Education, years (%) | ||||
| <10 | 7 | 13 | 13 | 18 |
| 10–12 | 60 | 60 | 72 | 78 |
| ≥12 | 33 | 27 | 15 | 4 |
| Leisure-time physical activity (%) | ||||
| Inactive | 31 | 34 | 36 | 33 |
| Active | 69 | 66 | 64 | 67 |
| No of somatic conditions (%) | ||||
| 0 | 62 | 62 | 63 | 58 |
| 1 | 30 | 30 | 29 | 33 |
| 2 | 6 | 6 | 7 | 7 |
| ≥3 | 2 | 2 | 2 | 2 |
| Smoking (%) | ||||
| Never | 50 | 48 | 44 | 50 |
| Previous | 25 | 23 | 22 | 22 |
| Current | 25 | 29 | 34 | 27 |
BMI, body mass index; HADS, Hospital Anxiety and Depression Scale.