Table 2.
Child and mother characteristics of the study population (n = 2420)
| Original data | Imputed data | |||
|---|---|---|---|---|
| n | % | n | % | |
| Mother | ||||
| Maternal educational background | ||||
| Low | 39 | 2% | 41 | 2% |
| Mid | 1662 | 69% | 1703 | 70% |
| High | 658 | 27% | 677 | 28% |
| Missing | 61 | 2% | – | – |
| Household income per month | ||||
| <2000 euro | 294 | 12% | 301 | 12% |
| ≥2000 euro | 1804 | 75% | 2119 | 88% |
| Missing | 322 | 13% | – | – |
| Marital status | ||||
| Married/living together | 2239 | 93% | 2298 | 95% |
| No partner | 121 | 5% | 122 | 5% |
| Missing | 60 | 3% | – | – |
| Smoking during pregnancy | 432 | 18% | 508 | 21% |
| Missing | 399 | 17% | – | – |
| Alcohol consumption during pregnancy | 1159 | 48% | 1420 | 59% |
| Missing | 296 | 12% | – | – |
| Body mass index at intake (mean; SD; kg/m2) | 24; | SD: 4 | 24; | SD: 4 |
| Missing | 214 | 9% | – | – |
| Perinatal folic acid supplementation | 1685 | 70% | 2230 | 92% |
| Missing | 593 | 25% | – | – |
| Maternal age at intake (mean, SD; years) | 32.0; | SD: 4.2 | 32.0; | SD: 4.2 |
| Missing | – | – | – | – |
| Nulliparous | 1454 | 60% | 1498 | 62% |
| Missing | 59 | 2% | – | – |
| History of intestinal disorders | 70 | 3% | 78 | 3% |
| Missing | 232 | 10% | – | – |
| History of diabetes mellitus, hypertension or hypercholesterolemia | 51 | 2% | 243 | 10% |
| Missing | 683 | 28% | – | – |
| Child | ||||
| Male gender | 1201 | 50% | 1201 | 50% |
| Missing | – | – | – | – |
| Birthweight (mean; SD; g) | 3503; | SD: 570 | 3503; | SD: 570 |
| Missing | – | – | – | – |
| Gestational age (mean, SD; weeks) | 39.9; | SD: 1.7 | 39.9; | SD: 1.7 |
| Missing | – | – | – | – |
| Breastfeeding | ||||
| Never breastfeeding | 231 | 10% | 302 | 13% |
| Partial breastfeeding until 4 months of age | 1314 | 54% | 1439 | 59% |
| Exclusive breastfeeding until 4 months of age | 630 | 26% | 679 | 28% |
| Missing | 245 | 10% | – | – |
| Timing of introduction of solids ≤6 months of age | 1620 | 67% | 1628 | 67% |
| Missing | 14 | 1% | – | – |
| History of food allergy in first year of life | 144 | 6% | 152 | 6% |
| Missing | 87 | 4% | – | – |
| Institutional and non‐institutional care in first year of life >16 h week−1 | 1301 | 54% | 1640 | 68% |
| Missing | 524 | 22% | – | – |
| Body mass index in second year of life | 16.5 | SD: 1.4 | 17.1; | SD: 1.3 |
| Missing | 536 | 22% | – | – |
| TV watching ≥2 h a day in second year of life | 223 | 9% | 245 | 10% |
| Missing | 166 | 7% | – | – |
SD, standard deviation.