Smoking and adolescent pregnancy outcome

Area of Science:

• Obstetrics and Gynecology
• Neonatal Health
• Public Health

Background:

• Adolescent pregnancy presents unique health challenges for both mother and infant.
• Maternal smoking is a known risk factor for adverse pregnancy outcomes.
• The specific impact of smoking on adolescent pregnancies requires further investigation.

Purpose of the Study:

• To investigate the association between smoking during pregnancy and adverse birth outcomes in adolescent mothers.
• To quantify the risks of delivering small-for-gestational-age (SGA) infants and low birth weight (LBW) infants in adolescent smokers compared to nonsmokers.
• To estimate the potential reduction in SGA and LBW births if adolescent smoking during pregnancy were eliminated.

Main Methods:

• A comparative study design was employed, analyzing data from 265 adolescent smokers and 510 adolescent nonsmokers.
• Infant outcomes including birth weight, gestational length, fetal/neonatal death, and NICU admission were assessed.
• Statistical adjustments were made for potential confounding variables to isolate the effect of smoking.

Main Results:

• Adolescent smokers delivered infants weighing an average of 222 g less than infants of nonsmokers.
• Adolescent smokers were 3.1 times more likely to have small-for-gestational-age infants.
• Smoking status showed minimal impact on low birth weight, preterm delivery, fetal/neonatal death, or neonatal intensive care admission.

Conclusions:

• Adolescent smoking during pregnancy is strongly linked to reduced infant birth weight and an increased likelihood of delivering small-for-gestational-age infants.
• While smoking had little effect on other outcomes like preterm birth or neonatal death, cessation could lead to significant reductions in SGA (up to 40%) and LBW (up to 14.5%) births.
• Public health initiatives targeting smoking cessation in pregnant adolescents are crucial for improving neonatal outcomes.