title: Adverse events among nursing home residents with Alzheimer's disease and psychosis.
abstract: OBJECTIVE
  The objective of this study was to quantify rates of adverse events in a high-risk multi-morbid population of institutionalized patients with Alzheimer's disease (AD).
  
  
  METHODS
  We conducted a retrospective cohort study among nursing home residents diagnosed with AD and psychosis during January 1998 to October 1999. Using the Medicare Minimum Data Set (MDS) and Medicare inpatient claims (ICD-9 codes), 7728 nursing home residents aged 55-95 years with AD and psychosis were identified for study. Potential adverse events of interest were identified from the MDS and Medicare inpatient claims (ICD-9 codes). We estimated the incidence rate (IR) and 95% confidence interval (CI) for each adverse event during a 2-year follow-up period.
  
  
  RESULTS
  Of the 7728 residents studied, nearly 30% were considered 'dependent' by the activities of daily living (ADL) score and approximately 15% exhibited severe cognitive impairment at baseline. At least 90% had comorbid psychiatric disorders. The most common adverse event was accidental injury, occurring at a rate of 97.7 per 100 person-years (95%CI = 94.7-100.7). Other common adverse events were death (IR = 44.6/100 person-years; 95%CI = 42.9-46.4), infection (IR = 41.8/100 person-years; 95%CI = 39.7-43.8), pain (IR = 43.5/100 person-years; 95%CI = 41.2-45.9), anorexia (41.3/100 person-years; 95%CI = 39.1-43.6), and weight change (IR = 40.2/100 person-years; 95%CI = 38.7-41.7).
  
  
  CONCLUSIONS
  This information on the occurrence of adverse outcomes among nursing home patients with AD and psychosis provides useful context for any safety event observed among patients treated for psychosis.
authors.affiliation: Episource, Hamden, CT, USA. oliveri1@mskcc.org
authors.forename: Susan A
authors.initials: SA
authors.lastname: Oliveria
authors.forename: Rosa
authors.initials: R
authors.lastname: Liperoti
authors.forename: Gilbert
authors.initials: G
authors.lastname: L'italien
authors.forename: Klaus
authors.initials: K
authors.lastname: Pugner
authors.forename: Allan
authors.initials: A
authors.lastname: Safferman
authors.forename: William
authors.initials: W
authors.lastname: Carson
authors.forename: Kate
authors.initials: K
authors.lastname: Lapane
mesh_terms: D000058:Accidental Falls / Q000706:statistics & numerical data; D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000150:complications* / Q000453:epidemiology / Q000628:therapy; D015897:Comorbidity; D003428:Cross Infection / Q000453:epidemiology; D005260:Female; D005500:Follow-Up Studies; D015577:Geriatric Assessment; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D015994:Incidence; D007344:Insurance Claim Reporting / Q000706:statistics & numerical data; D008297:Male; D008484:Medicaid; D006278:Medicare; D009735:Nursing Homes / Q000458:organization & administration; D017063:Outcome Assessment, Health Care; D011618:Psychotic Disorders / Q000150:complications* / Q000453:epidemiology / Q000628:therapy; D012189:Retrospective Studies; D012307:Risk Factors; D017751:Safety Management / Q000458:organization & administration*; D014481:United States / Q000453:epidemiology