Table 1 Demographic characteristics of the response groups
Characteristic | Responders (n = 5273) | Non-responders (n = 1126) | Effect sizesa/p-valuesb | Weighted responders (n = 5273) | Total group (n = 6399) |
|---|---|---|---|---|---|
Age (mean, sd) | 50.9 (17.6) | 39.3 (16.2) | d = 0.67 p <0.001 | 48.8 (17.9) | 48.8 (17.9) |
Gender (%) | Â | Â | p 0.538 | Â | Â |
 Female | 54.0 | 52.9 | SR 0.65 | 53.9 | 53.8 |
 Male | 46.0 | 47.1 | SR −0.65 | 46.1 | 46.2 |
Ethnicity (%) | Â | Â | p <0.001 | Â | Â |
 Native Dutch | 84.6 | 75.8 | SR 7.14 | 83.3 | 83.0 |
 Foreign, Western country | 7.0 | 7.0 | SR −0.07 | 7.0 | 7.0 |
 Foreign, Non-Western country | 4.4 | 6.7 | SR −3.22 | 4.8 | 4.8 |
 Unknown | 4.1 | 10.6 | SR −8.89 | 4.9 | 5.2 |
Education (%) | Â | Â | p <0.001 | Â | Â |
 Primary | 9.0 | 12.1 | SR −3.18 | 9.5 | 9.5 |
 Lower vocational | 25.1 | 18.7 | SR 4.62 | 24.0 | 24.0 |
 Secondary | 11.1 | 15.1 | SR −3.80 | 11.8 | 11.8 |
 Middle vocational | 23.0 | 23.6 | SR −0.46 | 23.1 | 23.1 |
 Higher vocational | 22.8 | 20.8 | SR 1.47 | 22.4 | 22.4 |
 University | 8.7 | 9.6 | SR −0.91 | 8.9 | 8.9 |
 Unknown | 0.3 | 0.2 | SR 0.54 | 0.3 | 0.3 |
Marital status (%) | Â | Â | p <0.001 | Â | Â |
 Married | 57.5 | 42.2 | SR 9.37 | 54.8 | 54.8 |
 Divorced | 9.1 | 9.2 | SR −0.12 | 9.1 | 9.1 |
 Widowed | 5.4 | 2.9 | SR 3.47 | 5.0 | 5.0 |
 Never married | 28.0 | 45.6 | SR −11.63 | 31.1 | 31.1 |
Employment status (%) | Â | Â | p <0.001 | Â | Â |
 Paid work | 49.0 | 58.9 | SR −5.99 | 50.8 | 50.8 |
 Unemployed | 3.5 | 2.8 | SR 1.30 | 3.4 | 3.4 |
 Disabled | 3.7 | 4.4 | SR −0.98 | 3.8 | 3.8 |
 School or study | 8.9 | 19.6 | SR −10.49 | 10.8 | 10.8 |
 Retired | 22.4 | 6.0 | SR 12.58 | 19.5 | 19.5 |
 Household | 8.7 | 5.2 | SR 3.83 | 8.1 | 8.1 |
 Other | 3.7 | 3.1 | SR 0.94 | 3.6 | 3.6 |
Monthly net income (%) | Â | Â | p <0.001 | Â | Â |
 0–500 Euro | 17.0 | 23.0 | SR −4.71 | 18.2 | 18.1 |
 501–1500 Euro | 35.9 | 31.3 | SR 2.98 | 35.1 | 35.1 |
 1501–2500 Euro | 31.7 | 28.0 | SR 2.46 | 31.2 | 31.1 |
  > 2500 Euro | 9.9 | 10.3 | SR −0.43 | 10.0 | 10.0 |
 Unknown | 5.4 | 7.5 | SR −2.66 | 5.6 | 5.8 |