Associations Between Polypharmacy, Symptom Burden, and Quality of Life in Patients with Advanced, Life-Limiting Illness

BACKGROUND: Polypharmacy may be particularly burdensome near the end of life, as patients “accumulate” medications to treat and prevent multiple diseases. OBJECTIVE: To evaluate associations between polypharmacy, symptom burden, and quality of life (QOL) in patients with advanced, life-limiting illness (clinician-estimated, 1 month–1 year). DESIGN: Secondary analysis of baseline data from a trial of statin discontinuation. PARTICIPANTS: Adults with advanced, life-limiting illness. MAIN MEASURES: Polypharmacy was assessed by summing the number of non-statin medications taken regularly or as needed. Symptom burden was assessed using the Edmonton Symptom Assessment Scale (range 0–90; higher scores indicating greater symptom burden) and QOL was assessed using the McGill QOL Questionnaire (range 0–10; higher scores indicating better QOL). Linear regression models assessed associations between polypharmacy, symptom burden, and QOL. KEY RESULTS: Among 372 participants, 47% were age 75 or older and 35% were enrolled in hospice. The mean symptom score was 27.0 (standard deviation (SD) 16.1) and the mean QOL score was 7.0 (SD 1.3). The average number of non-statin medications was 11.6 (SD 5.0); one-third of participants took ≥ 14 medications. In adjusted models, higher polypharmacy was associated with higher symptom burden (coefficient 0.81; p