Preterm birth was defined as delivery at 37 weeks of gestation or less.
A small-for-gestation baby was defined as birth weight less than 10th
percentile of weight for that gestational age.
Low birth weight (LBW) was defined as birth weight less than 2.50 kg.
Pregnancy-induced hypertension (PIH) in the antenatal period was
defined as two records of systolic blood pressure of 140 mmHg or
above and/ or diastolic blood pressure of 90 mmHg or above at least
6 hours apart after 20 weeks of gestation.
Anaemia was defined as haemoglobin concentration less than 11 gm/
dl in the first and third trimester or haemoglobin concentration less
than 10.5 gm/dl in the second trimester.