Figure 2.

Sensitivity of the Urine Toxicology Test in Detecting Self-Reported Frequency of Prenatal Cannabis Use Among 281,025 Pregnancies in Kaiser Permanente Northern California, 2009–2017

Notes. The sample included women screened for prenatal cannabis use by self-report with a urine toxicology test within ± two weeks. Any prenatal cannabis use includes daily, weekly and monthly or less prenatal cannabis use. Sensitivity was calculated as the proportion of patients who self-reported prenatal cannabis use (any, daily, weekly, monthly or less) who had a positive toxicology test.