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Association of Obstetrician Gender With Obstetric Interventions and Outcomes.

OBJECTIVE
To estimate whether there are differences in obstetric interventions or outcomes by the gender of the delivering physician.


METHODS
We conducted a retrospective cohort study of all nulliparous women delivering singleton, vertex, live births at 37 weeks of gestation or greater at a tertiary care institution (2014-2015). Patient clinical characteristics were analyzed by delivering physician gender. The primary outcomes were delivery mode and episiotomy. Secondary outcomes included major perineal laceration, postpartum hemorrhage, 5-minute Apgar score less than 7, cord umbilical artery pH less than 7.0, and neonatal intensive care unit admission. Univariable and hierarchical multivariable analyses including physician as a random effect were utilized for analyses.


RESULTS
Of the 7,027 women who met inclusion criteria, 81.3% (n=5,716) were delivered by a female physician. Women delivered by female physicians were slightly younger than those delivered by male physicians and were more likely to be publicly insured (11.7% vs 7.1%, P<.001). Mode of delivery did not differ by physician gender; the cesarean delivery rate was 20.6% for male physicians and 20.5% for female physicians (P=.61). Although the episiotomy rate did differ by physician gender, with 5.9% of patients delivered by male physicians undergoing episiotomy compared with 3.6% of patients delivered by female physicians (P=.001), this finding did not persist in the multivariable model after accounting for potential confounders (adjusted odds ratio 0.87, 95% CI 0.49-1.56). There were no differences by physician gender regarding any of the examined secondary outcomes in univariable or multivariable analyses.


CONCLUSION
Outcomes of nulliparous women undergoing a trial of labor did not differ by delivering physician gender.