title: Cannabis use during pregnancy in France in 2010.
abstract: OBJECTIVE
  The aim was to estimate the proportion of women who reported cannabis use during pregnancy, to analyse the demographic and social characteristics of users, and the link between cannabis use and either preterm or small-for-gestational-age birth.
  
  
  METHODS
  Data were obtained from interviews of a representative sample of women giving birth in France in 2010 in the days after delivery, and from their medical records.
  
  
  METHODS
  All maternity units in France.
  
  
  METHODS
  The analysis includes women with live singleton births in metropolitan France who responded to the question about cannabis use during pregnancy: in total, 13 545 women.
  
  
  METHODS
  The percentage of cannabis users during pregnancy was estimated, and variations according to social characteristics were described. Logistic regression analyses were used to investigate any associations between cannabis use and preterm birth or small-for-gestational-age status.
  
  
  METHODS
  Percentage of cannabis use, preterm birth rate, and small-for-gestational-age rate.
  
  
  RESULTS
  In all, 1.2% of women reported having used cannabis during pregnancy. This percentage was higher among younger women, women living alone, or women who had a low level of education or low income. It was also associated with tobacco use and drinking alcohol. Cannabis users had higher rates of spontaneous preterm births: 6.4 versus 2.8%, for an adjusted odds ratio (aOR) of 2.15 (95% CI 1.10-4.18). The corresponding aOR was 2.64 (95% CI 1.12-6.22) among tobacco smokers and 1.22 (95% CI 0.29-5.06) among non-tobacco smokers.
  
  
  CONCLUSIONS
  Although the reported rate of cannabis use during pregnancy in France is low, efforts should be continued to inform women and healthcare providers about the potential consequences of its use.
authors.affiliation: INSERM UMR-S 953, Epidemiological Research Unit on Perinatal Health and Women's and Children's Health, Université Pierre et Marie Curie (Paris VI), Paris, France.
authors.forename: M-J
authors.initials: MJ
authors.lastname: Saurel-Cubizolles
authors.forename: C
authors.initials: C
authors.lastname: Prunet
authors.forename: B
authors.initials: B
authors.lastname: Blondel
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000453:epidemiology* / Q000517:prevention & control; D000328:Adult; D000428:Alcohol Drinking / Q000453:epidemiology* / Q000517:prevention & control; D001724:Birth Weight; D004522:Educational Status; D005260:Female; D005602:France / Q000453:epidemiology; D007722:Health Knowledge, Attitudes, Practice; D006293:Health Promotion; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D002189:Marijuana Abuse / Q000150:complications / Q000453:epidemiology* / Q000517:prevention & control; D007752:Obstetric Labor, Premature; D016017:Odds Ratio; D011247:Pregnancy; D011256:Pregnancy Outcome; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology*; D000074606:Smoking Prevention; D012923:Social Class
keywords: Cannabis use; pregnancy; preterm birth; small for gestational age