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Sample characteristics and birth information
| n/Na | ||
|---|---|---|
| Ethnicity of mother, White: % | 94.4 | 6590/6979 |
| Multiparous, % | 54.9 | 3150/6741 |
| At least one birth complication, % | 14.9 | 1042/5229 |
| Infant birth weight, g: mean (s.d.) | 3426.86 (544.35) | 6896/6979 |
| Female children, % | 50.1 | 3499/6979 |
n = number of mothers in category; N = number of mothers with responses from the selected sample of 6979.
