Characteristics of the study sample compared with the Dutch population1-150 (data shown as percentages)
| Study sample (n=569) | Dutch population (n=15 000 000) | |
|---|---|---|
| Sex | ||
| Male | 46.2 | 49.4 |
| Female | 53.8 | 50.6 |
| Age (y) † | ||
| 20-39 | 40.3 | 44.0 |
| 40-64 | 45.8 | 38.8 |
| ⩾65 | 14.0 | 17.2 |
| Marital status † | ||
| Married | 68.0 | 61.9 |
| Unmarried | 32.0 | 38.1 |
| Region of home town | ||
| North | 9.5 | 10.6 |
| East | 18.8 | 18.9 |
| South | 24.3 | 24.5 |
| West | 47.5 | 46.0 |
| Education level ‡ | ||
| Low | 29.9 | 34.7 |
| Middle | 31.2 | 41.1 |
| High | 38.9 | 24.2 |
| Work status | ||
| Working | 53.9 | 57.5 |
| Not working | 46.1 | 42.5 |
↵1-150 Statistics of the Dutch national population are obtained from the Statistical Yearbook of the Dutch Central Bureau of Statistics6. †Difference between study sample and the Dutch population statistically significant with p<0.01. ‡Difference between study sample and the Dutch population statistically significant with p<0.001.