Defining maternal obesity in studies of birth outcomes: Comparing ICD-9 codes at delivery and measures on the birth certificate.

Elizabeth Wall-WielerBarbara AbramsJonathan M SnowdenSuzan L Carmichael

Published in: Paediatric and perinatal epidemiology (2020)

ICD-9 codes in childbirth discharge records captured only one in five women with pre-pregnancy obesity. Sensitivity varied by maternal characteristics and conditions. This misclassification resulted in bias when examining the association of obesity and pregnancy-related outcomes.

Keyphrases

pregnancy outcomes
insulin resistance
metabolic syndrome
weight loss
weight gain
high fat diet induced
type diabetes
birth weight
gestational age
preterm birth
pregnant women
adipose tissue
body mass index