Maternal underweight status and association with preterm contractions

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Public Health

Background:

• Maternal underweight is a growing concern in obstetric care.
• Preterm contractions pose significant risks to both mother and neonate.
• Understanding risk factors for preterm labor admission is crucial for effective management.

Purpose of the Study:

• To determine if underweight status increases the likelihood of admission for preterm contractions.
• To compare admission rates for preterm contractions among underweight, normal weight, and overweight pregnant women.

Main Methods:

• Retrospective cohort study of 840 patients presenting with preterm contractions (2000-2008).
• Body Mass Index (BMI) categorized using National Institutes of Health standards: underweight (≤19), normal (20–25), overweight (>25).
• Statistical analysis using probability models and chi-square testing, controlling for age and race.

Main Results:

• Admission rate for preterm contractions was highest in underweight women (95%), followed by normal weight (5%). No overweight patients were admitted.
• Underweight pregnant women were significantly more likely to be admitted for preterm contractions than normal weight women.
• Statistical models confirmed that normal weight patients were less likely to be admitted, even after adjusting for age and race.

Conclusions:

• Underweight status is associated with a higher likelihood of admission for preterm contractions.
• Overweight pregnant women in this cohort did not require admission for preterm contractions.
• Maternal BMI is an important factor to consider in the assessment and management of preterm contractions.