title: Comparison of self-reported and performance-based measures of functional ability in elderly patients in an emergency department: implications for selection of clinical outcome measures.
abstract: Assessment of functional ability in elderly patients is often based on self-reported rather than performance-based measures. This study aims to compare self-reported and performance-based measures of functional ability in a population of elderly patients at an emergency department (ED).
  
  
  
  Participants were 61 patients aged 65 years and above admitted to an ED. The self-reported measure used was the Barthel-20; the performance-based measures were Timed Up and Go (TUG); 30s-Chair Stand Test (30s-CST) and Assessment of Motor and Process Skills (AMPS) with the two scales; motor and process. Correlation analyses were conducted to examine the relationships between the self-reported and performance-based measures of functional ability.
  
  
  
  The correlation between the Barthel-20 and the TUG was moderate (r = -0.64). The correlation between the Barthel-20 and the AMPS motor was also moderate (r = 0.53). The correlation between the Barthel-20 and the 30s-CST was fair (r = 0.45). The correlation between Barthel-20 and the AMPS process was non-significant. The results were affected by high ceiling effect (Barthel-20).
  
  
  
  Self-reported and performance-based measures seem to assess different aspects of functional ability. Thus, the two methods provide different information, and this highlight the importance of supplementing self-reported measures with performance-based measures when assessing functional ability in elderly patients.
authors.affiliation: Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Aarhus C, Denmark. losnie@rm.dk.|School of Occupational Therapy at VIA University College, Aarhus N, Denmark. losnie@rm.dk.
authors.forename: Louise M
authors.initials: LM
authors.lastname: Nielsen
authors.affiliation: Research Center for Emergency Medicine, Aarhus University Hospital, Aarhus C, Denmark.
authors.forename: Hans
authors.initials: H
authors.lastname: Kirkegaard
authors.affiliation: Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Aarhus C, Denmark.
authors.forename: Lisa G
authors.initials: LG
authors.lastname: Østergaard
authors.affiliation: Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Aarhus C, Denmark.
authors.forename: Karina
authors.initials: K
authors.lastname: Bovbjerg
authors.affiliation: Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Aarhus C, Denmark.
authors.forename: Kasper
authors.initials: K
authors.lastname: Breinholt
authors.affiliation: MarselisborgCentret, DEFACTUM, Central Denmark Region, Department of Public Health, Aarhus University, Aarhus C, Denmark.
authors.forename: Thomas
authors.initials: T
authors.lastname: Maribo
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D003072:Cognition Disorders / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation*; D003430:Cross-Sectional Studies; D004185:Disability Evaluation; D004636:Emergency Service, Hospital; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology; D017063:Outcome Assessment, Health Care / Q000379:methods*; D026741:Physical Therapy Modalities; D057566:Self Report
keywords: Acute care; Assessment; Daily activities; Disability; Functional ability; Performance-based; Self-report