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  • Title: Initiation of benzodiazepines in the elderly after hospitalization.
    Author: Bell CM, Fischer HD, Gill SS, Zagorski B, Sykora K, Wodchis WP, Herrmann N, Bronskill SE, Lee PE, Anderson GM, Rochon PA.
    Journal: J Gen Intern Med; 2007 Jul; 22(7):1024-9. PubMed ID: 17453266.
    Abstract:
    OBJECTIVE: To estimate the rate of new chronic benzodiazepine use after hospitalization in older adults not previously prescribed with benzodiazepines. DESIGN: Retrospective cohort study using linked, population-based administrative data. SETTING: Ontario, Canada between April 1, 1992 and March 31, 2005. PARTICIPANTS: Community-dwelling seniors who had not been prescribed benzodiazepine drugs in the year before hospitalization were selected from all 1.4 million Ontario residents aged 66 years and older. MAIN OUTCOME MEASURES: New chronic benzodiazepine users, defined as initiation of benzodiazepines within 7 days after hospital discharge and an additional claim within 8 days to 6 months. We used multivariate logistic regression to examine for the effect of hospitalization on the primary outcome after adjusting for confounders. RESULTS: There were 405,128 patient hospitalizations included in the cohort. Benzodiazepines were prescribed to 12,484 (3.1%) patients within 7 days of being discharged from hospital. A total of 6,136 (1.5%) patients were identified as new chronic benzodiazepine users. The rate of new chronic benzodiazepine users decreased over the study period from 1.8% in the first year to 1.2% in the final year (P < .001). Multivariate logistic regression found that women, patients admitted to the intensive care unit or nonsurgical wards, those with longer hospital stays, higher overall comorbidity, a prior diagnosis of alcoholism, and those prescribed more medications had significantly elevated adjusted odds ratios for new chronic benzodiazepine users. Older individuals had a lower risk for the primary outcome. CONCLUSION: New benzodiazepine prescription after hospitalization occurs frequently in older adults and may result in chronic use. A systemic effort to address this risky practice should be considered.
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