Volume 53 | Number S1 | August 2018

Abstract List

Ifeoma Muoto Ph.D., M.S., Blair G. Darney Ph.D., M.P.H., Bernard Lau M.P.H., Yvonne W. Cheng M.D., Ph.D., Mark W. Tomlinson M.D., M.B.A., Duncan R. Neilson M.D., Steven A. Friedman M.D., Joanne Rogovoy B.S., Aaron B. Caughey M.D., Ph.D., Jonathan M. Snowden Ph.D.


To assess the use and timing of scheduled cesareans and other categories of cesarean delivery and the prevalence of neonatal morbidity among cesareans in Oregon before and after the implementation of Oregon's statewide policy limiting elective early deliveries.

Data Sources

Oregon vital statistics records, 2008–2013.

Study Design

Retrospective cohort study, with multivariable logistic regression, regression controlling for time trends, and interrupted time series analyses, to compare the odds of different categories of cesarean delivery and the odds of neonatal morbidity pre‐ and postpolicy.

Data Collection/Extraction Methods

We analyzed vital statistics data on all term births in Oregon (2008–2013), excluding births in 2011.

Principal Findings

The odds of early‐term scheduled cesareans decreased postpolicy (adjusted odds ratio [aOR], 0.70; 95 percent confidence interval [CI], 0.66–0.74). In the postpolicy period, there were mixed findings regarding assisted neonatal ventilation and neonatal intensive care unit admission, with regression models indicating higher postpolicy odds in some categories, but lower postpolicy odds after controlling for time trends.


Oregon's hard stop policy limiting elective early‐term cesarean delivery was associated with lower odds of cesarean delivery in the category of women who were targeted by the policy; more research is needed on impact of such policies on neonatal outcomes.