Women's prepregnancy underweight as a risk factor for preterm birth: a retrospective study.

ABSTRACT:

Objective

To investigate the distribution of known factors for preterm birth (PTB) by severity of maternal underweight; to investigate the risk-adjusted relation between severity of underweight and PTB, and to assess whether the relation differed by gestational age.

Design

Retrospective cohort study.

Setting

State of California, USA.

Methods

Maternally linked hospital and birth certificate records of 950 356 California deliveries in 2007-2010 were analysed. Singleton live births of women whose prepregnancy body mass index (BMI) was underweight (<18.5 kg/m² ) or normal (18.50-24.99 kg/m² ) were analysed. Underweight BMI was further categorised as: severe (<16.00), moderate (16.00-16.99) or mild (17.00-18.49). PTB was grouped as 22-27, 28-31

SUBMITTER: Girsen AI 

PROVIDER: S-EPMC5069076 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature