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Table 3 Unadjusted and adjusted changes in maternal and infant outcomes pre- and post-intervention

From: Evaluation of a Tennessee statewide initiative to reduce early elective deliveries using quasi-experimental methods

Outcomes Unadjusted Outcomes per 1000 Births Adjusted
Odds Ratio b
(95% CI)
P-value
Pre-Intervention
(n = 149,333)
Post-Intervention
(n = 133,840)
Crude Change
Maternal
Operative Vaginal Deliverya 69.1 60.8 − 8.3 0.86 (0.83–0.89) < 0.0001
Perineal Lacerationa 13.7 12.6 − 0.9 0.91 (0.84–0.99) 0.0216
Prolonged Labor 6.3 5.8 −0.5 0.92 (0.84–1.02) 0.1080
Blood Transfusion 1.9 1.8 −0.1 0.99 (0.83–1.17) 0.8816
Unplanned Operation or Hysterectomy 1.4 1.3 −0.1 0.90 (0.74–1.11) 0.3242
Infant
Apgar < 7 at 5 min 20.5 20.5 0.0 1.01 (0.96–1.07) 0.5827
Ventilation 49.6 37.9 −11.7 0.74 (0.71–0.77) < 0.0001
Antibiotics 17.9 17.2 −0.7 0.95 (0.90–1.01) 0.1011
NICU Admission 54.1 59.2 + 5.1 1.10 (1.07–1.14) < 0.0001
Neonatal Mortality 4.9 4.8 −0.1 1.03 (0.92–1.14) 0.6189
Infant Mortality 6.7 6.7 0.0 1.04 (0.95–1.14) 0.4406
  1. aExcludes cesarean births
  2. bModels are adjusted for maternal age (in years), race (white vs. black or other), Hispanic ethnicity (yes vs. no), less than high school education (yes vs. no), insurance type (private vs. Medicaid or other), annual income <$25,000 vs $25,000+, less than five vs. five or more prenatal visits, and nulliparous vs. multiparous