"Thirty-one percent of state prisoners and 25% of federal prisoners reported drinking alcohol at the time of the offense.
"Nearly 4 in 10 state prisoners (39%) and 3 in 10 federal prisoners (31%) reported using drugs at the time of the offense.
"Among state prisoners, males (32%) were more likely than females (26%) to report drinking alcohol at the time of the offense but were less likely (39%) than females (49%) to report using at least one drug at the time of the offense.
"An estimated 2 in 10 state (21%) and federal (20%) prisoners reported using marijuana at the time of the offense.
"About 20% of state and 11% of federal prisoners reported ever using heroin, and 5% of state and 3% of federal prisoners reported using it at the time of the offense.
"Among those not incarcerated for the entire 12 months prior to admission to prison, about 49% of state and 32% of federal prisoners met the criteria for having a substance use disorder in that time period."
Laura M. Maruschak, Jennifer Bronson, PhD, and Mariel Alper, PhD. Alcohol and Drug Use and Treatment Reported by Prisoners: Survey of Prison Inmates, 2016. US Dept. of Justice Bureau of Justice Statistics. NCJ Number 252641. July 2021.