Table 1.

Subject characteristics (N = 8,162)

	Median (90% range) or percentage
Maternal characteristics
Age (years)	30.3 (20.4; 37.8)
Height (cm)	167 (155; 180)
Pre-pregnancy weight (kg)	64 (50; 91)
Ethnicity (%)
Dutch	59.4%
Other European	5.9%
Dutch Antilles	2.4%
Cape Verdian	3.5%
Moroccan-Arabic	1.9%
Moroccan-Berber	3.7%
Surinamese-Creole	3.2%
Surinamese-Hindustani	3.4%
Turkish	8.0%
Others	8.6%
Primigravida (%)	43.4%
Nullipara (%)	56.6%
Maternal smoking during pregnancy (%)	17.0%
Child characteristics
Male (%)	50.4%