title: Prevalence of Potentially Inappropriate Medication Use in Older Adults Living in Nursing Homes: A Systematic Review.
abstract: As older adults living in nursing homes are at a high risk of adverse drug-related events, medications with a poor benefit/risk ratio or with a safer alternative should be avoided.
  
  
  
  To systematically evaluate the prevalence of potentially inappropriate medication use in nursing home residents.
  
  
  
  We searched in PubMed and EMBASE databases (1990-2015) for studies reporting the prevalence of potentially inappropriate medication use in people ≥60 years of age living in nursing homes. The risk of bias was assessed with an adapted version of the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist.
  
  
  
  A total of 91 articles were assessed for eligibility, and 48 met our inclusion criteria. These articles reported the findings from 43 distinct studies, of which 26 presented point prevalence estimates of potentially inappropriate medication use (227,534 nursing home residents). The overall weighted point prevalence of potentially inappropriate medication use in nursing homes was 43.2% [95% confidence interval (CI) 37.3%-49.1%], increasing from 30.3% in studies conducted during 1990-1999 to 49.8% in studies conducted after 2005 (P < .001). Point prevalence estimates reported in European countries were found to be higher (49.0%, 95% CI 42.5-55.5) than those reported in North America (26.8%, 95% CI 16.5-37.1) or in other countries (29.8%, 95% CI 19.3-40.3). In addition, 18 studies accounting for 326,562 nursing home residents presented 20 distinct period prevalence estimates ranging from 2.3% to 50.3%. The total number of prescribed medications was consistently reported as the main driving factor for potentially inappropriate medications use.
  
  
  
  This systematic review shows that almost one-half of nursing home residents are exposed to potentially inappropriate medications and suggests an increase prevalence over time. Effective interventions to optimize drug prescribing in nursing home facilities are, therefore, needed.
authors.affiliation: Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden. Electronic address: lucas.morin@ki.se.
authors.forename: Lucas
authors.initials: L
authors.lastname: Morin
authors.affiliation: University Hospital of Limoges, Service de Pharmacologie, Toxicologie et Pharmacovigilance, Limoges, France; Université de Limoges, Faculté de Médecine, Limoges, France.
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Laroche
authors.affiliation: University Hospital of Rennes, Palliative Care Support Team, Rennes, France.
authors.forename: Géraldine
authors.initials: G
authors.lastname: Texier
authors.affiliation: Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.
authors.forename: Kristina
authors.initials: K
authors.lastname: Johnell
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D057189:Checklist; D005260:Female; D006801:Humans; D008297:Male; D009735:Nursing Homes; D000067561:Potentially Inappropriate Medication List / Q000706:statistics & numerical data; D015995:Prevalence
keywords: Inappropriate prescribing; nursing home; older adults; pharmacoepidemiology