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  • Title: Racial disparities in access after regulatory surveillance of benzodiazepines.
    Author: Pearson SA, Soumerai S, Mah C, Zhang F, Simoni-Wastila L, Salzman C, Cosler LE, Fanning T, Gallagher P, Ross-Degnan D.
    Journal: Arch Intern Med; 2006 Mar 13; 166(5):572-9. PubMed ID: 16534046.
    Abstract:
    BACKGROUND: We examined the effects of a prescription-monitoring program on benzodiazepine access among Medicaid enrollees living in neighborhoods of different racial composition. METHODS: We used interrupted time series and logistic regression to analyze data from noninstitutionalized persons aged 18 years or older (N = 124 867) enrolled continuously in New York Medicaid 12 months before and 24 months and 7 years after initiation of the program. We used census data to identify the racial composition of the neighborhoods. Outcome measures were nonproblematic use (short term, within dosing guidelines), potentially problematic use (>120 days' use or more than twice the recommended dose), and pharmacy hopping (filling prescriptions for the same benzodiazepine in different pharmacies within 7 days). RESULTS: There was a sudden, sustained reduction in benzodiazepine use in all the neighborhoods after the program's introduction. Despite the lowest rates of baseline use, enrollees in predominantly (> or = 75%) black neighborhoods experienced the highest rates of discontinuation after introduction of the program. This difference remained 7 years after policy initiation. Compared with white participants, black participants were more likely to discontinue nonproblematic (odds ratio, 1.78; 95% confidence interval, 1.47-2.17) and potentially problematic (odds ratio, 1.77; 95% confidence interval, 1.45-2.17) benzodiazepine use, after adjusting for sex, eligibility status, neighborhood poverty, and baseline use. The program almost completely eliminated pharmacy hopping in all racial groups, although less among white participants (82.6%) vs black participants (88.7%). CONCLUSIONS: A systematic benzodiazepine prescription-monitoring program reduced inappropriate prescribing, with a stronger effect in predominantly black neighborhoods despite lower baseline use. The policy may have resulted in an unintended decrease in nonproblematic use that disproportionately affects black populations.
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