Table 1 Comparison between respondent and non-respondent to initial questionnaire in the two municipalities
| Â | Capelle aan den IJssel | Â | Â | Â | Dordrecht | Â | Â | Â |
|---|---|---|---|---|---|---|---|---|
| Â | Total | Responders | Non-responders | P-value* | Total | Responders | Non-responders | P-value* |
|  | N = 29,163 | n = 7,779 | n = 21,385 |  | N = 49,979 | N = 12,799 | N = 37,180 |  |
Age at mailing, median, yrs†| 53.6 | 55.1 | 52.9 | 0.000 | 54.1 | 55.9 | 53.5 | 0.000 |
Gender, male, % | 47.9 | 45.9 | 48.6 | 0.000 | 49.6 | 46.5 | 50.7 | 0.000 |
Country of birth, % | Â | Â | Â | Â | Â | Â | Â | Â |
Netherlands | 82.9 | 88.3 | 80.9 | 0.000 | 84.0 | 89.9 | 81.9 | 0.000 |
Other | 17.1 | 11.7 | 19.1 | Â | 16.0 | 10.1 | 18.1 | Â |
  Western country | 6.6 | 4.7 | 7.2 |  | 6.3 | 4.8 | 6.8 |  |
  Non-Western country | 10.6 | 7.0 | 11.8 |  | 9.7 | 5.3 | 11.2 |  |
Social Status, % | Â | Â | Â | Â | Â | Â | Â | Â |
High | 30.3 | 39.2 | 27.0 | 0.000 | 0.8 | 0.6 | 0.9 | 0.000 |
Middle high | 5.1 | 3.8 | 5.6 | Â | 43.1 | 51.3 | 40.3 | Â |
Middle low | 42.8 | 33.2 | 46.4 | Â | 23.6 | 21.7 | 24.3 | Â |
Low | 21.8 | 23.8 | 21.0 | Â | 32.5 | 26.4 | 34.6 | Â |