a: Denominators differ due to missing data.
b: Pregnancy outcomes were adjusted for maternal age, ethnicity, total years of full-time education, household income, gravidity, intake of alcohol and recreational drugs, smoking, pre-pregnancy body mass index (continuous), use of multivitamin supplements, Edinburgh Postnatal Depression Scale (EPDS), The State-Trait Anxiety Inventory (STAI), Perceived Stress Scale (PSS-10), physical activity, infertility treatment and asthma. Birth outcomes were additionally adjusted for infant’s sex.
c: Reasons for admission: preterm, respiratory distress infection, feeding problem, hypoglycaemia, drug withdrawal, SGA, birth asphyxia, congenital abnormality, phototherapy and cyanosis.