title: Group Prenatal Care Outcomes in a Military Population: A Retrospective Cohort Study.
abstract: OBJECTIVE
  To evaluate pregnancy outcomes in Centering Pregnancy patients.
  
  
  METHODS
  This was an IRB-approved retrospective cohort study from November 2009 to January 2013 involving 202 Centering Pregnancy patients and 202 Certified Nurse Midwife patients. The primary outcome was mean gestational age at time of delivery. Secondary outcomes included cesarean and operative vaginal delivery rate, triage visit frequency, Neonatal Intensive Care Unit admission rate, 1 and 5 minute APGAR scores, birth weight, breastfeeding rate at discharge and 6 weeks postpartum, third and fourth degree laceration rate, weight gain in pregnancy, and excessive weight gain rate.
  
  
  RESULTS
  There was no statistically significant difference in any obstetric outcome including preterm delivery rate. Centering Pregnancy patients were more likely to be active duty (52.0 vs. 35.6%, p = 0.001), younger (24.8 vs. 26.3 years old, p < 0.001), and nulliparous (75.2 vs. 56.9%, p < 0.001). There was a statistically significant increase in triage visit frequency ≥ 6 for Centering Pregnancy patients (11.9% vs. 8.9%, p = 0.011).
  
  
  CONCLUSIONS
  There were no clinically significant differences in the primary or secondary outcomes. Significant cost savings could be realized by expanding Centering Pregnancy in the military health system.
authors.affiliation: Department of Obstetrics and Gynecology, Naval Medical Center San Diego, 34800 Bob Wilson Drive, San Diego, CA 92134.
authors.forename: Robert Bruce
authors.initials: RB
authors.lastname: Walton
authors.affiliation: Department of Obstetrics and Gynecology, Walter Reed National Military Medical Center, 8901 Wisconsin Avenue, Bethesda, MD 20889-5600.
authors.forename: Sara
authors.initials: S
authors.lastname: Shaffer
authors.affiliation: Department of Obstetrics and Gynecology, Naval Medical Center San Diego, 34800 Bob Wilson Drive, San Diego, CA 92134.
authors.forename: Jason
authors.initials: J
authors.lastname: Heaton
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008887:Military Medicine / Q000458:organization & administration*; D008889:Military Personnel; D017063:Outcome Assessment, Health Care; D011247:Pregnancy; D011256:Pregnancy Outcome; D011295:Prenatal Care / Q000458:organization & administration*; D012189:Retrospective Studies; D014481:United States; D055815:Young Adult