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| N (weighted %) | Mean (SE) | |
| Sex | ||
| Women | 1445 (47) | |
| Men | 1466 (53) | |
| Marital status | ||
| Unmarried | 639 (22) | |
| Married | 2272 (78) | |
| Occupational grade | ||
| Manual | 834 (29) | |
| Lower nonmanual | 813 (27) | |
| Upper nonmanual | 819 (28) | |
| Self-employed | 445 (16) | |
| Daily smoking | ||
| No | 2186 (75) | |
| Yes | 725 (25) | |
| Somatic illness | ||
| No | 1273 (43) | |
| Yes | 1638 (57) | |
| Mental illness | ||
| No | 2531 (87) | |
| Yes | 380 (13) | |
| Age | 44.8 (0.15) | |
| Body mass index | 26.4 (0.07) | |
