Abstract
Background Self-report of nonmedical prescription opioid use (NMPU) is a cornerstone of drug abuse surveillance, policymaking, and treatment service planning, but misclassification creates bias and may confuse or undermine NMPU estimates [1]. We detected old OxyContin (OC) abuse reports long after a reformulated version (OP) was released (August 2010). This study explored sources of possible NMPU misclassification and proposed solutions. Materials and methods A mixed-methods approach identified demographic, behavioral, and cognitive factors influencing endorsement of old formulations in: a) multivariable regression analyses of NMPU data from the ASI-MV surveillance program [2] examined predictors of endorsing old (vs. new) formulations during the post-reformulation period (n = 8032); b) prevalence estimates of OC availability from an online recreational drug user forum survey (fall 2013; n = 459); and c) semistructured interviews (n = 29) and cognitive interviews (n = 7) among residential and outpatient substance abuse treatment program clients reporting past 2-year use of OC/OP. A coding guide identified patterns and themes of misidentification in transcribed interviews.
Highlights
Self-report of nonmedical prescription opioid use (NMPU) is a cornerstone of drug abuse surveillance, policymaking, and treatment service planning, but misclassification creates bias and may confuse or undermine NMPU estimates [1]
Materials and methods A mixed-methods approach identified demographic, behavioral, and cognitive factors influencing endorsement of old formulations in: a) multivariable regression analyses of NMPU data from the ASI-MV surveillance program [2] examined predictors of endorsing old formulations during the post-reformulation period (n = 8032); b) prevalence estimates of OC availability from an online recreational drug user forum survey; and c) semistructured interviews (n = 29) and cognitive interviews (n = 7) among residential and outpatient substance abuse treatment program clients reporting past 2-year use of OC/OP
Post-reformulation, OC use was endorsed by users aged 21–34 and people having recently initiated heroin, but trends reversed over time (p < 0.05)
Summary
Self-report of nonmedical prescription opioid use (NMPU) is a cornerstone of drug abuse surveillance, policymaking, and treatment service planning, but misclassification creates bias and may confuse or undermine NMPU estimates [1]. We detected old OxyContin (OC) abuse reports long after a reformulated version (OP) was released (August 2010). This study explored sources of possible NMPU misclassification and proposed solutions
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