the yes/no indicator that asks whether the participant had used opioid analgesics (including methadone), and misused prescription pain medications, such as oxycodone (OxyContin, Percocet), hydrocodone (Vicodin), morphine, Dilaudid, fentanyl, and buprenorphine (Suboxone, Subutex) as part of the Timeline Followback Method assessment, a calendar-based measure for assessing self-reported retrospective daily estimates of alcohol, tobacco and/or illicit substance use.