Increased risk for alcohol- and other substance-exposed pregnancies among women who smoke tobacco: A secondary analysis of a primary care-based intervention

Abstract

Introduction: Among women at risk for alcohol-exposed pregnancies (AEP), smoking tobacco may be associated with increased severity of alcohol use, and risk for tobacco-exposed and other substance-exposed pregnancies (TEPs/SEPs). Our secondary data analysis of the 'CHOICES Plus' intervention trial explored AEP and SEP risk by smoking status.

Methods: Eligible women (N=261) were recruited from 12 primary care clinics in a public healthcare system, not pregnant, aged 18-44 years, drinking >3 drinks/day or >7 drinks/week, sexually active, and not using effective contraception. We compared women who did and did not smoke tobacco on alcohol and drug severity, and psychological distress (e.g. anxiety) at baseline.

Results: Participants were primarily Hispanic (47.1%) or non-Hispanic Black (41.8%) and reported incomes <$20000/year (69.3%). Tobacco smoking prevalence was 45.2%. Compared to non-smokers, those who smoked drank more days/week (mean=3.3, SD=2.0 vs mean=2.7, SD=1.8, p<0.01), had higher alcohol use disorders identification test (AUDIT) scores (mean=12.1, SD=7.6 vs mean=9.8, SD=7.1, p<0.05), were more likely to report current drug use (66.1% vs 48.3%, p<0.01), and had a greater number of (lifetime) drugs used (mean=3.0, SD=2.0 vs mean=2.0, SD=1.5 days, p<0.0001). Also, those who smoked reported greater levels of anxiety (mean=5.9, SD=5.6 vs mean=4.5, SD=4.9, p<0.05), lower confidence to not drink (mean=2.8, SD=0.8 vs mean=3.1, SD=1.0, p<0.01), lower confidence to reduce risky drinking (mean=6.3, SD=3.1 vs mean=7.3, SD=2.8, p<0.0001), greater drinking temptations (mean=3.0, SD=0.9 vs mean=2.6, SD=0.9, p<0.01), and, yet greater readiness to reduce alcohol use (mean=6.2, SD=3.0 vs mean=5.2, SD=3.0, p<0.05).

Conclusions: Women who drink and smoke may have the highest AEP, TEP, and other SEP risk. Primary care providers should screen for alcohol and tobacco co-use and provide brief intervention and/or treatment referral.

Clinical trial registration: The study was registered on the official website of ClinicalTrials.gov.

Identifier: ID NCT01032772.

Keywords: alcohol-exposed pregnancy; preconception; substance-exposed pregnancy; tobacco-exposed pregnancy.