高齢者におけるベンゾジアゼピン系薬の服用量変更と転倒との関連：急性期病院入院患者を対象にした解析

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Objective:It is well known that the use of benzodiazepines is associated with falling in elderly people, but there have been few researches focused on changes in the dose of benzodiazepines and falls. If the association between changes in the dose of benzodiazepines and falling becomes clear, we may take an action to prevent falling.In this study, we investigated the association between changes in the dose of benzodiazepines and falling among elderly inpatients in an acute-care hospital.Design:Falling generally results from an interaction of multiple and diverse risk factors and situations, and medication history of each subject must be considered in this study. We conducted a case-crossover study in which a case was used as his/her own control at different time periods. Therefore covariates that were not time-dependent were automatically adjusted in this study.Methods:Subjects were patients who had falling at one hospital between April 1, 2008 and November 30, 2009. Data were collected from incident report forms and medical records. Odds ratio for changes in the dose of benzodiazepines were calculated using conditional logistic regression analyses.Results:A total of 422 falling by elderly people were eligible for this study. The odds ratio for increased amounts of benzodiazepines was 2.02(95% Confidence Interval(CI):1.15, 3.56). On the other hand, the odds ratio for decreased amounts of benzodiazepines was 1.11(95%CI:0.63,1.97).Conclusion:There was an association between increased amounts of benzodiazepines and falling. Hence, it is considered meaningful to pay attention to falling when amounts of benzodiazepines are increased to prevent falling in hospitals.

高齢者におけるベンゾジアゼピン系薬の服用量変更と転倒との関連：急性期病院入院患者を対象にした解析

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