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Objectives. To examine the impact of school shootings on indicators of adolescent school safety in the United States. Methods. We linked 2009–2019 Youth Risk Behavior Survey data on 211 236 adolescents aged 14 to 18 years from 24 school districts with data on high school shootings from the Center for Homeland Defense and Security. We conducted 2-way fixed-effects logistic regression models to assess the impact of shootings on self-report of 3 indicators of school safety: avoiding school because of feeling unsafe, carrying a weapon at school, and being threatened or injured with a weapon at school. Results. High school shootings were associated with adolescents having 20% greater odds of avoiding school because of feeling unsafe (adjusted odd ratio [AOR] = 1.20; 95% confidence interval [CI] = 1.11, 1.29) than those who had not. Findings were slightly attenuated in sensitivity analyses that tested exposure to shootings at any school in the district or state. High school shootings were associated with a statistically nonsignificant (P =.08) elevated risk of carrying a weapon at school (AOR = 1.11; 95% CI = 0.99, 1.25). Conclusions. The negative ramifications of school shootings extend far beyond the event itself to adolescents' concerns about school safety. (Am J Public Health. 2023;113(4):438–441. https://doi.org/10.2105/AJPH.2022.307206) [ABSTRACT FROM AUTHOR]

• Over one million youth drive annually under the influence of cannabis/alcohol. • More youth drive under the influence (DUI) of cannabis (6.3%) than alcohol (2.6%). • Among past-year cannabis users, 24.5% report past-year DUI of cannabis. • Among past-year alcohol users, only 6.1% report past year DUI of alcohol. • Driving under the influence is highly associated with criminal justice involvement. Driving under the influence (DUI) of psychoactive substances is an important public health and criminal justice issue, impacting the lives of millions of Americans. Although recent research provides up-to-date information regarding DUI among adults, there is a pressing need for research that focuses specifically on younger/underage drivers. We draw from a large, nationally-representative sample to provide up-to-date evidence as to the prevalence and key criminal justice, substance use, and behavioral health correlates of DUI of cannabis and alcohol among drivers ages 16 to 20 in the United States. We used data from the 2020 and 2021 National Survey on Drug Use and Health (young drivers ages 16–20; N =12,863). All analyses—survey adjusted prevalence estimates, logistic regression—were conducted using Stata SE 17.0 and weighted to account for the study's stratified cluster sampling design. The prevalence of DUI-cannabis for the full sample—including those not endorsing past-year use—was 6.3%. Among youth endorsing past-year cannabis use, 24.5% reported DUI of cannabis. In the full sample and among cannabis users, DUI-cannabis risk was elevated among older and male youth. The prevalence of DUI-alcohol was 2.6% among all youth and 6.1% among youth reporting past-year alcohol consumption. Estimates indicate that more than one million young drivers each year are placing their lives and those of others at risk by operating motor vehicles after consuming cannabis and/or alcohol. Findings underscore the importance of prevention efforts targeting underaged cannabis and alcohol-impaired driving. [ABSTRACT FROM AUTHOR]