Descriptive statistics of the Nord-Trøndelag Health Study (HUNT) at baseline (1995)
| Symptoms n | ||||
| 0 | 1 | 2 | 3 | |
| Age years | 38.4±8.6 | 40.3±8.8 | 40.1±8.8 | 42.7±8.1 |
| BMI kg·m-2 | 25.5±3.6 | 25.8±3.8 | 25.6±3.7 | 25.9±4.0 |
| HADS-A | 3.1±2.6 | 4.1±2.9 | 5.0±3.2 | 6.4±3.8 |
| HADS-D | 2.2±2.2 | 2.9±2.6 | 3.5±2.8 | 4.6±3.4 |
| Sex | ||||
| Male | 4171 (55.2) | 2778 (54.1) | 1450 (56.4) | 1588 (59.7) |
| Female | 3392 (44.8) | 2354 (45.9) | 1122 (43.6) | 1072 (40.3) |
| Education | ||||
| Low | 1148 (15.2) | 933 (18.2) | 482 (18.7) | 740 (27.8) |
| Mid-range | 4167 (55.1) | 2735 (53.3) | 1433 (55.7) | 1311 (49.3) |
| High | 2248 (29.7) | 1464 (28.5) | 657 (25.5) | 609 (22.9) |
| Economic difficulties | ||||
| No | 5495 (72.7) | 3496 (68.1) | 1595 (62.0) | 1603 (60.3) |
| Yes | 2068 (27.3) | 1636 (31.9) | 977 (38.0) | 1057 (39.7) |
| Smoking status | ||||
| Never | 3902 (51.6) | 2437 (47.5) | 988 (38.4) | 1062 (39.9) |
| Former | 1771 (23.4) | 1383 (26.9) | 639 (24.8) | 732 (27.5) |
| Current | 1890 (25.0) | 1312 (25.6) | 945 (36.7) | 866 (32.6) |
| Total | 7563 (42.2) | 5132 (28.6) | 2572 (14.3) | 2660 (14.8) |
Data are presented as mean±sd or n (%). BMI: body mass index; HADS-A: Hospital Anxiety and Depression Scale-Anxiety; HADS-D: Hospital Anxiety and Depression Scale-Depression. n=17 927