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Table 2 Association uteroplacental bleeding disorders with paternal characteristics: United States, 1995–2001

From: Uteroplacental bleeding disorders during pregnancy: do missing paternal characteristics influence risk?

Paternal characteristics Rate (%) Relative risk (95% confidence interval)
   Unadjusted Adjusted†
   Placenta previa
Complete 0.33 1.00 (Reference) 1.00 (Reference)
Age only missing 0.30 0.92 (0.85, 1.00) 1.08 (0.99, 1.18)
Race only missing 0.32 0.98 (0.92, 1.04) 1.03 (0.96, 1.11)
Both missing 0.27 0.83 (0.81, 0.85) 1.03 (1.01, 1.06)
   Placental abruption
Complete 0.56 1.00 (Reference) 1.00 (Reference)
Age only missing 1.00 1.80 (1.72, 1.88) 1.30 (1.24, 1.37)
Race only missing 0.65 1.15 (1.10, 1.20) 1.00 (0.95, 1.05)
Both missing 0.80 1.43 (1.41, 1.45) 1.08 (1.06, 1.10)
  1. † Relative risks were adjusted for maternal age, maternal race, parity, maternal education, prenatal care began, marital status, smoking during pregnancy, chronic hypertension, and prior cesarean delivery.