Table 2.

Infant characteristics

	All (n = 4,683)
	n (%)
Sex
Male	2,371 (50.6)
Female	2,312 (49.4)
Mode of Delivery
Vaginal	3,500 (74.7)
Cesarean	1,169 (25.0)
Missing	14 (0.3)
Birth weight (g), mean ± SD	2,383.7 ± 349.8
Gestational week, mean ± SD	39.0 ± 2.0
Height SDS < −2 at 2 years of age	619 (13.2)
Height SDS < −2 at 3 years of age	502 (10.7)
Height SDS < −2 at 4 years of age	422 (9.0)

Note: SD: Standard deviation; SDS: Standard deviation score;

SGA: Small for gestational age