Table 11.

Description of maternal and infant outcomes collected from the EMR.

Gestational Age	Measured in Weeks
Birth weight	Measured in grams immediately following birth
Birth length	Measured in centimeters immediately following birth
Head circumference	Measured in centimeters immediately following birth
Birth weight percentile	The WHO growth standards are used to calculate birth weight percentile. Out of 100 infants the same age, an infant in the 50th percentile will have 50 infants smaller and 50 infants larger than them
Birth length percentile	The WHO growth standards are used to calculate the birth length percentile. Out of 100 infants the same age, an infant in the 50th percentile will have 50 infants shorter and 50 infants longer than them
Head circumference percentile	The WHO growth standards are used to calculate the head circumference percentile. Out of 100 infants the same age, an infant in the 50th percentile for head circumference will have 50 infants with smaller heads and 50 infants with larger heads
Maternal Smoking Status	Never smoker: the mother never smoked
	Current/Former smoker: the mother reported previously smoking or smoking at the time of delivery
BMI Categorization	Not obese: BMI ≤ 30 kg/m2
	Obese: BMI > 30 kg/m2
Delivery mode	Vaginal
	Caesarean