Table 1 Respondent characteristics (age, ethnicity, educational level and parity) compared to National perinatal registry data, year 2019
Respondent characteristics | n (%) or mean [SD] | Chi-Square | ||
|---|---|---|---|---|
Respondents n = 12,239 | National perinatal registry* or CBS** | p-value | ||
Age at time of birth | Mean [standard deviation] | 30,6 [3.97] |  | p < 0.001 |
< 25 | 616 (5.6) | 13,499 (8.4)* | ||
25–29 | 3770 (34.3) | 47,468 (29.4) | ||
30–34 | 4924 (44.8) | 64,390 (39.8) | ||
35–39 | 1505 (13.7) | 30,420 (18.8) | ||
≥ 40 | 178 (1.6) | 5844 (3.6) | ||
Missing | 1246 | Â | Â | |
Ethnicity | Both parents are born in the Netherlands | 9514 (87.7) | 3,158,000 (71.5)** | p < 0.001 |
Respondent and (one of) her parents born abroad | 384 (3.5) | 762,000 (17.3) | ||
Respondent born in NL, (one of) her parents born abroad | 955 (8.8) | 493,000 (11.2) | ||
Missing | 1386 | Â | Â | |
Educational level at time of birth | Low | 673 (6.1) | 975,000 (22.6)** | p < 0.001 |
Middle | 2659 (24.3) | 1,710,000 (39.6) | ||
High | 7617 (69.6) | 1,633,000 (37.8) | ||
Missing | 1290 | Â | Â | |
Parity | First birth | 7033 (57.5) | 71,950 (44.5)* | p < 0.001 |
Second birth or more | 5206 (42.5) | 89,589 (55.5) | ||
Missing | 0 | Â | Â | |