Demographic and clinical predictors of vitamin D status in pregnant women tested for deficiency in Western Australia

Objective: This study aimed to describe the vitamin D status of pregnant women in Western Australia and identify predictors of deficiency in pregnancy. Methods: A cross‐sectional study was conducted using linked data from statewide administrative data collections. Participants included pregnant women aged 18–44 years who gave birth between 2012 and 2014. Results: The mean 25‐hydroxyvitamin D (25[OH]D) concentration was 70.7 nmol L−1 (SD 25.7; range 5–255 nmol L−1). Approximately one‐fifth of the pregnant women were vitamin D deficient (