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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: JAMA Pediatr. 2018 Nov 5:10.1001/jamapediatrics.2018.3096. doi: 10.1001/jamapediatrics.2018.3096

Figure 1: Trends in past 30-day alcohol use, cigarette smoking, and cannabis use in pregnant women aged 18–44 years (n=12,058).

Figure 1:

Gray triangle = alcohol; Orange square = cigarettes; Blue diamond = marijuana; adjusted prevalence (adjustment for survey features only) shown as point estimate, with 95% confidence intervals (vertical bars). Linear trend shown as dotted line.

The prevalences for cannabis use during pregnancy reported here differ slightly from those previously reported by Brown et al., 2017. We adjust our estimates for complex survey features while Brown and colleagues adjusted for a variety of socio-demographic characteristics in a log-Poisson setting.