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Table 2 Risk factors at the index pregnancy for recurrent preterm birth at the subsequent delivery

From: Early preterm delivery due to placenta previa is an independent risk factor for a subsequent spontaneous preterm birth

   Factor Odds Ratio ( 95% confidence interval)
Spontaneous preterm birth 4.38 (3.71-5.17)
Preterm placenta previa 3.60 (1.52-8.51)
Preterm severe preeclampsia 2.82 (1.66-4.78)
Preterm IUGR 1.48 (1.003-2.18)
Severe preeclampsia 1.56 (1.01-2.53)
IUGR 1.52 (1.18-1.96)
Placenta previa 0.71 (.33-1.54)
Maternal age 1.03 (1.01-1.04)