Table 1.
Demographic and lifestyle characteristics of 518 mother-child pairs from the Generation R study population.
| Median (25th, 75th percentile) or % | |
|---|---|
| Maternal characteristics | |
| Age | 31.2 (28.6, 43.0) |
| Missing | - |
| Ethnicity | |
| Dutch | 61.4% |
| Other western | 13.1% |
| Non-western | 25.5% |
| Missing, N | - |
| Educational level | |
| Low | 11.2% |
| Intermediate | 28.6% |
| High | 60.2% |
| Missing, N | 11 |
| Income | |
| <1,200 | 11.6% |
| 1,200–2,00 | 14.8% |
| >2,000 | 73.6% |
| Missing, N | 52 |
| Non-verbal IQ | 100.0 (90.0, 107.0) |
| Missing, N | 7 |
| Body mass index | 23.0 (21.2, 25.9) |
| Missing, N | 2 |
| Parity | |
| 0 | 66.3% |
| 1 | 24.2% |
| >=2 | 9.5% |
| Missing, N | 2 |
| Smoking use during pregnancy | |
| No smoking during pregnancy | 79.1% |
| Until pregnancy recognized | 8.8% |
| Continued during pregnancy | 12.1% |
| missing | 40 |
| Alcohol consumption during pregnancy | |
| No consumption during pregnancy | 33.2% |
| Until pregnancy recognized | 17.7% |
| Continued occasionally | 42.1% |
| Continued frequently | 7.0% |
| Missing, N | 21 |
| Child characteristics | |
| Child age at assessment | 9.8 (9.6, 9.9) |
| Missing, N | - |
| Child sex | |
| Male | 49.4% |
| Female | 50.6% |
| Missing, N | - |