Background The increasing phenomena of multimorbidity and polypharmacy in older adults with cancer predisposes them to potentially inappropriate medication (PIM), which adversely affects patient prognosis.
Objective To systematically evaluate the prevalence of PIM in older adults with cancer.
Methods The Cochrane Library, Web of Science, Embase, PubMed, CNKI, VIP, Wanfang Data, and CBM databases were searched to collect studies related to the prevalence of PIM in older adults with cancer, and the search period was from the inception of the databases to September 2024. The examined literature was independently screened, data extracted, and evaluated, and Stata 17.0 software was used to perform meta-analysis.
Results A total of 36 studies with 54 prevalence estimates were analyzed, including 95 290 patients. Meta-analysis indicated that the prevalence of PIM in older adults with cancer was 44.5% (95%CI=39.2%-49.8%). The results of subgroup analysis showed that the prevalence of PIM in older adults with cancer aged 60-70 and >70 years was 44.4% and 46.1%, respectively; the prevalence of PIM in elderly male and female patients was 40.9% and 42.5%, respectively; the prevalence of PIM in patients with ≤5 and >5 diseases was 34.4% and 47.1%, respectively; the prevalence of PIM in patients with≥5 and <5 medications was 39.9% and 30.4%, respectively; the prevalence of PIM in patients with lung cancer, gastrointestinal cancer, hematologic malignancies, breast cancer, and prostate cancer was 45.6%, 39.4%, 42.0%, 39.4%, and 42.6%, respectively; the prevalence of PIM among older adults with cancer in Asia, Europe, North America, and South America was 50.2%, 45.8%, 35.7%, and 51.4%, respectively; the prevalence of PIM in patients from hospitals, databases, Dana-Farber Cancer Institute, and cancer centers was 47.6%, 43.0%, 34.6%, and 34.5%, respectively; the prevalence of PIM screened by the Beers criteria, DAE, STOPP/START criteria, EU (7) -PIM list, and the 2017 Chinese criteria was 46.6%, 16.5%, 44.6%, 60.0%, and 39.3%, respectively; the prevalence of PIM published in 2020 and before and after 2020 was 36.1% and 52.5%, respectively.
Conclusion The prevalence of PIM is relatively high in older adults with cancer, at 44.5%. The prevention, screening, and intervention of potential inappropriate medication among relevant populations should be emphasized to lay a solid foundation for the health in older adults with cancer.