| Summary: | Abstract Background Potentially inappropriate medications (PIMs) are a major concern in geriatric care. PIMs increase the risk of falls in elderly patients. However, the relationship between PIMs, subsequent falls, and functional prognosis for distal radius fracture (DRF) remains unclear. The aim of this study was to examine the relationship between PIMs, activities of daily living, and subsequent falls in elderly DRF patients. Methods The study included 253 patients aged ≥ 65 years who required surgical treatment for DRF. Clinical characteristics of patients obtained included age, sex, body mass index, number of medicines used at admission, number and type of PIMs used at admission, bone mineral density, use of drugs for osteoporosis, severity of comorbidities, nutritional status, Barthel Index (BI), length of hospital stay, subsequent falls, fracture type, and Mayo wrist score. Subjects were divided into two groups according to PIMs use and no use. Propensity score matching was used to assess patient characteristics and confirm factors affecting BI and subsequent falls. Results One hundred seven patients (42.3%) were prescribed PIMs upon hospital admission. The mean BI gain was significantly lower in patients prescribed PIMs than in those who were not (p = 0.006), as was the rate of falls post-surgery (p = 0.009). Multivariate analysis of BI gain showed that PIMs affected BI gain (95% confidence interval [CI], − 1.589 to − 0.196, p = 0.012), and logistic regression analysis revealed that PIMs influenced subsequent falls (odds ratio, 0.108, 95% CI, 1.246 to 2.357, p < 0.001). Conclusions PIM use hindered the improvement in activities of daily living and increased the incidence of subsequent falls in patients assessed. These results demonstrate the importance of appropriate drug control for patients with DRF.
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