Table 1.

Baseline characteristics of the study population (n = 107).

	Mean ± s.d., median (range) or n (%)
Perinatal
Gestational age	39.5 ± 1.8, 39.5 (33.9–42.1)
Birth weight	3480 ± 629, 3569 (1806–5290)
Male sex	61 (55.5)
Vaginal delivery	40 (32.5)
Perinatal infection	34 (30.9)
Respiratory problems	9 (8.2)
Maternal
Age	33.9 ± 4.8, 34 (21–44)
Non-Dutch ethnicity	52 (47.3)
Smoking	2 (1.8)
Nulliparae	67 (54.5)
Hypertensive disorders	7 (6.4)