Risks of perinatal mortality and morbidity (stillbirth, neonatal death, or 5-min Apgar score <4) by birthweight (excluding deaths due to congenital anomalies).

aThe occurrence of stillbirth or neonatal death.
bData are adjusted ORs estimated from multiple regression models adjusted for maternal age, gestational age, parity, infant sex, maternal diabetes, chronic hypertension, pregnancy associated hypertension, eclampsia, smoking, social economic status (marital status, education) and month of prenatal care started.
cThe occurrence of stillbirth, neonatal death, or 5-min Apgar score less than four.