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Characteristics of the infant population at recruitment
| Characteristics | % (n) |
| Gender | |
| Female | 45.7 (200) |
| Male | 54.3 (238) |
| Birth weight | |
| Mean (SD)1 | 3215 (493) |
| Delivery mode | |
| Vaginal delivery | 49.0 (218) |
| Caesarean section | 51.0 (220) |
| Multiplicity | |
| Singletons | 95.4 (418) |
| Twins | 4.6 (20) |
| Prematurity (< 37 wk) | |
| No | 91.0 (399) |
| Yes | 9.0 (39) |
| Newborn health problems2 | |
| No | 80.5 (350) |
| Yes | 19.5 (86) |
In grams;
Missing cases n = 2. n: Absolute numbers.
