In our study, experience previous history of placenta abruption was identified as the most significant risk factor for preterm birth with odds ratio of 3.928 and 95% CI 1.136-13.586 found in 3.7% cases of early preterm birth Comparing to 1% in late preterm birth (control), which indicated by P-value 0.027 as a highly significant.
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Risk Factors for Early Preterm Birth at King Salman Armed Force Hospital in 2010.
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