in order of statistical significance , the most important variables were placental inflammation ( p = 0.002 ) , gestational age less than 34 weeks ( p = 0.008 ) , gestational age 34 to 37 weeks ( p = 0.013 ) , male sex ( p = 0.015 ) , apgar score less than 6 at 5 minutes ( p = 0.023 ) , and clinical amnionitis ( maternal fever , fetal tachycardia , or amniotic or gastric fluid leukocytes or bacteria ) ( p = 0.044 ) .
C0032043
placental
C0002631
amnionitis