Associations between maternal stress and smoking: findings from a population-based prospective cohort study

Addiction, 05/09/2012

Maternal stress and relationship discord may inhibit smoking cessation during pregnancy and promote resumption of smoking after pregnancy in women who have achieved abstinence.

Methods

  • A prospective population-based cohort study.
  • A total of 71,757 women in the Norwegian Mother and Child Cohort Study (MoBa) participating twice during pregnancy and at 6 months postpartum.
  • Respondents' estimates of anxiety and depression, relationship discord and negative life events were measured, along with self-reports of smoking behaviour and demographic variables.
  • Smoking was assessed at gestation weeks 17 and 30 and at 6 months postpartum.

Results

  • Of the 27.5% women who smoked at conception, 55.8% quit smoking during pregnancy.
  • At 6 months postpartum, 28.9% of quitters had relapsed to smoking. In total, 12.9% of the sample reported smoking during the pregnancy.
  • Adjusted for well-known risk factors, women reporting high levels of anxiety and depression had a decreased likelihood of quitting smoking during pregnancy [odds ratio (OR) 0.80, 95% confidence interval (CI): 0.73, 0.88) and an increased likelihood of relapsing after delivery (OR 1.26, 95% CI: 1.11, 1.44).
  • Both relationship discord (OR 0.82, 95% CI: 0.75, 0.90) and exposure to negative life events (OR 0.93, 95%: CI 0.90, 0.96) had a negative influence on quitting smoking during pregnancy but had no influence on relapse to smoking postpartum.

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