Abstract: | ObjectiveTo determine the risk factors for preterm births occurring spontaneously or due to premature rupture of membranes in our environment.Patients and methodWe performed a retrospective case-control study at the Complejo Hospitalario Universitario de Albacete (Spain) that compared 315 pregnant women with preterm labor occurring spontaneously or due to premature rupture of membranes with 315 women selected as controls who delivered at term. The variables were grouped into sociobiological parameters, obstetric history, and characteristics of the current pregnancy.ResultsPrevious preterm birth (OR = 3.4; 95% CI, 1.7-6.7), prior abortions (p = 0.002), multiple gestation (OR = 28.1; 95% CI, 6.7-116.8), assisted reproductive technology (ART) (OR = 5.8; 95% CI, 2.3-14.1), hospitalization and tocolytic therapy (OR = 10.8; 95% CI, 4.2-27.7), and cerclage (OR = 5.6; 95% CI, 1.2-25.7) were more frequent in cases. However, when OR were adjusted (aOR) by other variables, the risk for cerclage disappeared (aOR = 2.8; 95% CI, 0.5-14).ConclusionsRisk factors for preterm birth in our population were a history of preterm birth and abortions, multiple gestation, ART, and hospitalization with tocolytic therapy. |