title: A national study showed that diagnoses varied by age group in nursing home residents under age 65.
abstract: OBJECTIVE
  Those aged <65 in nursing homes (NHs) are substantially different from elderly residents. This study uses data gathered from the Resident Assessment Instrument's Minimum Data Set (MDS) to describe these relatively rare residents.
  
  
  METHODS
  The study uses MDS assessments of close to three-quarter million residents in nine states from 1994 to 1996. Residents are described within chronological age group (0-4, 5-14, etc.). Factor analysis is used to develop diagnostic clusters, and the prevalence of these clusters, functional problems, other conditions, and treatments is described for each group.
  
  
  RESULTS
  Thirteen diagnostic clusters describe nearly 85% of all NH residents and highlight differences between age groups. Pediatric residents are substantially more physically and cognitively impaired than young adult residents, and have the highest case mix burden of care. The youngest population primarily has diagnoses related to mental retardation and developmental disabilities, young adults have the highest prevalence of hemi- and quadriplegia, while older residents are typified by increasing prevalence of neurological diagnoses.
  
  
  CONCLUSIONS
  This study offers an initial description of NH residents <65. The prevalence of residents with unique conditions may suggest the need to modify the MDS assessment instrument.
authors.affiliation: Institute of Gerontology and School of Public Health, University of Michigan, 300 North Ingalls, Ann Arbor, MI 48109-2007, USA. bfries@umich.edu
authors.forename: Brant E
authors.initials: BE
authors.lastname: Fries
authors.forename: Walter P
authors.initials: WP
authors.lastname: Wodchis
authors.forename: Caroline
authors.initials: C
authors.lastname: Blaum
authors.forename: Amna
authors.initials: A
authors.lastname: Buttar
authors.forename: John
authors.initials: J
authors.lastname: Drabek
authors.forename: John N
authors.initials: JN
authors.lastname: Morris
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002170:Canada / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D006233:Persons with Disabilities; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008875:Middle Aged; D009422:Nervous System Diseases / Q000453:epidemiology*; D009735:Nursing Homes; D015995:Prevalence; D014481:United States / Q000453:epidemiology