Substance use and treatment—At each interview, respondents were asked to report
whether they had used various substances, including heavy use of alcohol (5 or more drinks
per sitting) MA, crack/cocaine, heroin, and tranquilizers/benzodiazapines; whether they ever
used these substances on a regular basis; and how long ago they last used each substance.
Regular use of alcohol to intoxication, crack/cocaine, heroin or tranquilizers/
benzodiazapines, and past year use of MA and crack/cocaine were examined in this analysis.