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Risk factors for preterm birth subtypes

G S Berkowitz1, C Blackmore-Prince, R H Lapinski

  • 1Department of Obstetrics, Gynecology and Reproductive Science, Mount Sinai School of Medicine, New York, NY 10029, USA.

Epidemiology (Cambridge, Mass.)
|May 16, 1998
PubMed
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Black and Hispanic women, previous preterm birth, and in utero diethylstilbestrol exposure are key risk factors for preterm birth subtypes. Early prenatal care is also crucial for preventing preterm labor and medically induced births.

Area of Science:

  • Obstetrics and Gynecology
  • Epidemiology
  • Perinatal Health

Background:

  • Preterm birth remains a leading cause of neonatal morbidity and mortality.
  • Understanding specific risk factors for preterm birth subtypes is essential for targeted interventions.
  • Previous studies have identified general risk factors, but subtype-specific analyses are less common.

Purpose of the Study:

  • To identify and assess epidemiologic risk factors for distinct preterm birth subcategories within an urban population.
  • To compare risk factors across preterm premature rupture of membranes, preterm labor, and medically induced preterm births.

Main Methods:

  • Retrospective cohort study of 31,107 singleton livebirths at Mount Sinai Hospital, NYC (1986-1994).
  • Preterm births were categorized into three subtypes: preterm premature rupture of membranes, preterm labor, and medically induced.

Related Experiment Videos

  • Data on epidemiologic risk factors were extracted from a computerized perinatal database.

    • Main Results:

    • Increased risk for all preterm subtypes was observed in Black and Hispanic women, those with a prior preterm birth, and in utero diethylstilbestrol (DES) exposure.
    • Preexisting diabetes mellitus and antepartum bleeding significantly increased the risk for all subtypes, particularly medically induced births.
    • Delayed prenatal care (after the first trimester) was associated with increased risk across all subtypes.

    Conclusions:

    • Epidemiologic risk factors for preterm birth vary among subtypes, necessitating specific assessment.
    • Racial/ethnic background, previous preterm birth history, and specific medical conditions are significant predictors of preterm birth.
    • Targeted public health strategies addressing these identified risk factors are crucial for reducing preterm birth rates.