1991-2018.

occasions in the past 30 days, stratified by sex, race/ethnicity, and parental education. FINDINGS: FCU among US adolescents increased over the study period; the peak in 2010-2018 was 11.4% among 18-year old students. This increase was best explained by both period and cohort effects. Compared with respondents in 2005, adolescents Read more…