Polypharmacy Thresholds that Best Predict Emergency Room Visits and Mortality in Older Adults: A Population-Based Study in Québec, Canada

Alexandre Campeau Calfat, Justin P. Turner, Marc Simard, Marjolaine Dubé, Caroline Sirois, Faculty of Pharmacy, Université Laval, Québec City, Institut national de santé publique du Québec, Centre de Recherche en Santé Durable, Québec City, Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Science, Monash University

Journal of Applied Gerontology

Published online on October 28, 2025

Abstract

Journal of Applied Gerontology, Volume 45, Issue 9, Page 1809-1821, September 2026.
BackgroundPolypharmacy is prevalent among older adults. Identifying informative medication thresholds could enhance clinical decision-making and healthcare planning.ObjectivesTo measure the predictive capacity of medication count and polypharmacy ...