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Ann Epidemiol. 2010 Aug;20(8):592-8. doi: 10.1016/j.annepidem.2010.05.009.

Maternal body composition, smoking, and hyperemesis gravidarum.

Author information

1
Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway. ase.vigdis.vikanes@fhi.no

Abstract

PURPOSE:

To study associations between maternal prepregnant body mass index (BMI), smoking, and hyperemesis gravidarum (hyperemesis).

METHODS:

The sample consisted of 33,467 primiparous women from the Norwegian Mother and Child Cohort Study (1999-2008). Data on hyperemesis, BMI, education, maternal age, eating disorders, maternal and paternal smoking habits were obtained from questionnaires. All associations were studied by logistic regression.

RESULTS:

Altogether, 353 (1.1%) women had hyperemesis. Among non-smokers, both underweight and obese women were more likely to develop hyperemesis than normal-weighted women: odds ratio (OR), 2.36; 95% confidence interval (95% CI), 1.43-3.88 and OR, 1.48; 95% CI, 1.00-2.20, respectively. No associations were found among smokers. Women who smoked daily (OR, 0.44; 95% CI, 0.32-0.60) or occasionally (OR, 0.64; 95% CI, 0.44-0.93) had lower risk of hyperemesis than non-smokers. No effect of partner's smoking habits was observed.

CONCLUSIONS:

Both underweight and obesity were associated with hyperemesis, but only among non-smokers. Maternal prepregnant smoking reduced the risk of hyperemesis, whereas partner's smoking habits had no effect.

PMID:
20609338
DOI:
10.1016/j.annepidem.2010.05.009
[Indexed for MEDLINE]

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