Table 1: Characteristics of the study patients.

Gender
 male, (%)61 (47.3)
 female, (%)68 (52.7)
Birth weight, g, mean; range3574; 2090–4660
Mode of delivery*
 vaginal birth, (%)103 (85.1)
 caesarean section, (%)18 (14.9)
Maternal smoking during pregnancy
 yes, (%)2 (1.6)
 no, (%)127 (98.4)
Older siblings
 yes, (%)50 (39.8)
 no, (%)79 (61.2)
Duration of breastfeeding, mean; range (mo)9.6; (0.5–36)

*Data of 8 mothers missing.