Figure 2. Adjusted Prevalence of Cannabis Use Among 367 403 Pregnancies During Pregnancy by Frequency of Use, 2009-2017.

Adjusted prevalence estimates (dots) and 95% CIs (error bars) were estimated from Poisson regression models controlling for age group, race/ethnicity, and median neighborhood household income (extracted from the electronic health record [Table 2]). Self-reported cannabis use during pregnancy was assessed via a questionnaire as part of standard prenatal care (at approximately 8 weeks’ gestation).