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Association of Adverse Events in Opioid Addiction Treatment With Quality Measure for Continuity of Pharmacotherapy

ABSTRACT Several quality measures for continuity of substance use care are being used in accountability programs, but it is not known whether they are predictive of better patient outcomes. We analyzed whether opioid use disorder (OUD) patients in the care of clinicians and practices with higher rates on one of these measures—continuity of pharmacotherapy for OUD—have a lower risk of overdose and detox events using Medicare data. For a 10-percentage point increase in an individual clinician's measure rate, the estimated odds ratios of a patient experiencing each of these two events were 0.92 (95% confidence interval [CI] 0.85 to 0.99) for overdose and 0.83 (95% CI 0.75 to 0.92) for detox. The corresponding estimates at the practice level were 0.90 (95% CI 0.85 to 0.95) for overdose and 0.83 (95% CI 0.77 to 0.89) for detox. These results suggest that a clinician's or practice's higher measure rate for continuity of pharmacotherapy for OUD is predictive of their patients' lower likelihood of having an adverse event. The findings contribute to a growing body of evidence on the importance of treatment continuity for OUD and support the validity of measuring continuity in provider-level accountability programs.