Early Measures of Maternal Alcohol Misuse as Predictors of Adverse Pregnancy Outcomes

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Abstract
Pregnancy outcome was studied in 531 obstetric outpatients with respect to maternal alcohol consumption prior to pregnancy recognition, (absolute alcohol per day prior to pregnancy, PPAA) and indications of problem drinking (IPD). Multiple regression was used to predict pregnancy outcome with PPAA and IPD, controlling for potentially confounding sociodemographic and health factors. PPAA predicted spontaneous abortion and lowered Apgar scores. The risk of spontaneous abortion increased an average of 25% for each additional ounce of absolute alcohol consumed per day (p < 0.05). Adverse pregnancy outcomes related to intrauterine growth were more strongly related to IPD than PPAA, and IPD remained a significant predictor even after controlling for PPAA. The strongest association was with head circumference (p < 0.01); logistic regression indicated that for each additional indication of problem drinking reported, risk of head circumference below the 10th percentile increased 2.77 times. Other pregnancy outcome measures negatively related to IPD were 5-min Apgar scores (p < 0.05), birth weight (p < 0.10), and 1-min Apgar scores (p < 0.10). No significant curvilinear alcohol effects or interactions were observed. These findings highlight the potential clinical utility of PPAA and IPD in the early identification of women whose alcohol use puts their pregnancies at high risk.

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