Trends in Self-reported and Biochemically Verified Cocaine and Methamphetamine Use Among Pregnant Individuals in Northern California, 2011-2019

This cross-sectional study uses data from the Kaiser Permanente Northern California health care system with universal screening via self-report and urine toxicology at prenatal care entrance to examine trends in cocaine and methamphetamine use among pregnant individuals from 2011 to 2019.

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