Short interpregnancy interval as a risk factor for preterm birth in non-Hispanic Black and White women in California.

ABSTRACT:

Objective

Short interpregnancy interval (IPI) is associated with adverse pregnancy outcomes, including preterm birth (PTB < 37 weeks GA). We investigated whether short IPI (< 6 months) contributes to the higher PTB frequency among non-Hispanic Blacks (NHB).

Study design

Using a linked birth cohort > 1.5 million California live births, we examined frequencies of short IPI between racial/ethnic groups and estimated risks by multivariable logistic regression for spontaneous PTB. We expanded the study to births 1991-2012 and utilized a "within-mother" approach to permit methodologic inquiry about residual confounding.

Results

NHB women had higher frequency (7.6%) of short IPI than non-Hispanic White (NHW) women (4.4%). Adjusted odds ratios for PTB and short IPI were 1.64

SUBMITTER: Lonhart JA 

PROVIDER: S-EPMC6713584 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature