ArticleCancer2025
Association between medication burden and acute care use in older metastatic prostate cancer patients on androgen receptor signaling inhibitors.
Article in Cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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9 authors.
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Abstract
backgroundManagement of metastatic prostate cancer often requires combining androgen deprivation therapy (ADT) with novel androgen receptor signaling inhibitors (ARSIs). Although these agents improve survival, older patients may face acute care utilization from medication burden, reflected in polypharmacy and nonadherence.
methodsUsing SEER-Medicare data, the authors identified patients ≥66 years old with de novo metastatic prostate cancer prescribed abiraterone, enzalutamide, or apalutamide (2010-2017). Polypharmacy was defined by the Youden index (≥8 medications). ARSI adherence was measured by medication possession ratio (≥0.8) from initiation to discontinuation, assessed over 6 months. Acute care use was defined as any inpatient hospitalization or emergency visit within 6 months. Demographic characteristics were compared by t-tests/χ
resultsAmong 2697 patients (mean age, 75 years), most were White (80.3%), married (63.1%), and received prior ADT (85.3%). Polypharmacy was present in 50.6% of patients before ARSI initiation, whereas ARSI nonadherence in the 6 months post-initiation was 34.0%. Polypharmacy and adherence were not significantly associated. In adjusted analyses controlling for demographic, clinical, and treatment factors, both polypharmacy (IRR, 1.59; 95% confidence interval [CI], 1.28-1.98) and ARSI nonadherence (IRR 2.50; 95% CI, 2.00-3.03) independently prognosticated higher acute care use.
conclusionsMedication burden, as characterized by suboptimal adherence and polypharmacy, is an independent risk factor for acute care use among older adults initiating ARSI treatment for metastatic prostate cancer. These findings highlight an opportunity for potential interventions to reduce downstream acute care use.
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