Health outcomes associated with polypharmacy in community-dwelling older adults: a systematic review - PubMed (original) (raw)
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Health outcomes associated with polypharmacy in community-dwelling older adults: a systematic review
Terri R Fried et al. J Am Geriatr Soc. 2014 Dec.
Abstract
Objectives: To summarize evidence regarding the health outcomes associated with polypharmacy, defined as number of prescribed medications, in older community-dwelling persons.
Design: Systematic review of MEDLINE (OvidSP 1946 to May, Week 3, 2014).
Setting: Community.
Participants: Observational studies examining health outcomes according to number of prescription medications taken.
Measurements: Association between number of medications and health outcomes. Because of the importance of comorbidity as a potential confounder of the relationship between polypharmacy and health outcomes, articles were assessed regarding the quality of their adjustment for confounding.
Results: Of the 50 studies identified, the majority that were rated good in terms of their adjustment for comorbidity demonstrated relationships between polypharmacy and a range of outcomes, including falls, fall outcomes, fall risk factors, adverse drug events, hospitalization, mortality, and measures of function and cognition. However, a number of these studies failed to demonstrate associations, as did a substantial proportion of studies rated fair or poor.
Conclusion: Data are mixed regarding the relationship between polypharmacy, considered in terms of number of medications, and adverse outcomes in community-dwelling older persons. Because of the challenge of confounding, randomized controlled trials of medication discontinuation may provide more-definitive evidence regarding this relationship than observational studies can provide.
Keywords: observational studies; polypharmacy; systematic review.
© 2014, Copyright the Authors Journal compilation © 2014, The American Geriatrics Society.
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