Table 4.

Univariate Analysis of Risk Factors for Early-onset Sepsis

CharacteristicGBS (n = 41)Non-GBS (n = 61)
Cases, % ExposedControls, % ExposedMatched Odds Ratio95% CICases, % ExposedControls, % ExposedMatched Odds Ratio95% CI
Demographic information
 Maternal age <20 y26.813.82.87.96 –8.6127.930.5.90.47 –1.72
 Black race55.061.6.77.28 –2.144.441.82.10.63 –7.07
Pregnancy exposures
 Cigarette smoker19.415.21.46.52 –4.1116.715.81.12.45 –2.80
Obstetric history
 Began prenatal care before month 784.485.1.84.26 –2.6798.096.7.50.03 –7.99
 Previous stillbirth/
spontaneous abortion
17.125.0.59.17 –1.9821.123.0.70.29 –1.69
Labor and delivery information
 Intrapartum antibiotics12.815.2.88.26 –2.9917.026.1.49.21 –1.17
 Intrapartum fever23.15.24.101.25 –13.3912.17.51.75.64 –4.83
 Rupture of membranes ≥18 h10.05.42.04.439 –9.48217.515.01.17.50 –2.74
 Amnionitis10.53.82.67.60 –11.928.85.91.48.44 –4.95
 Rupture of membranes before labor12.89.91.37.36 –5.1723.115.21.45.61 –3.49
 Vaginal exams ≥640.519.52.931.08 –7.9715.514.41.04.41 –2.62
 Rupture of membranes ≥18 h/fever30.89.73.271.21 –8.8421.419.21.09.49 –2.40