title: Why do older adults decide they are having difficulty with a task?
abstract: OBJECTIVE
  Previous studies have identified risk factors for decline in physical function, but they have not examined specific reasons older adults report difficulty with mobility tasks.
  
  
  METHODS
  Community-dwelling people ( n = 160) aged 59 yr and older in an observational cohort study were questioned to determine the most common cited reasons for self-reported difficulty in task performance.
  
  
  RESULTS
  Mobility tasks were most often reported to be difficult (66%). The reasons cited for difficulty in low exercise tolerance tasks were task modification by method (33%) and rate (33%). For high exercise tolerance tasks, reasons cited included having to modify the rate of performing the task (20%) or the method (13%). Among those who reported difficulty with low exercise tolerance mobility tasks, >80% reported modification (odds ratio, 46.4 [95% confidence limits: 9.75, 220.51]) and 32% also report frequency change (odds ratio, 5.9 [95% confidence limits: 2.72, 12.85]) as the reason for perceiving difficulty. For those who reported difficulty performing high exercise tolerance-demanding tasks, >90% reported modification (odds ratio, 5.5 [95% confidence limits: 2.05, 14.88]) and 61% also report frequency changes (odds ratio, 3.9 [95% confidence limits: 1.93, 8.04]).
  
  
  CONCLUSIONS
  The findings suggest that people are able to cite specific reasons for difficulty with mobility task performance, most commonly related to task modification.
authors.affiliation: Departments of Physical Medicine and Rehabilitation, The Johns Hopkins Unviersity School of Medicine, Baltimore, Maryland 21239, USA.
authors.forename: Patricia C
authors.initials: PC
authors.lastname: Gregory
authors.forename: Linda P
authors.initials: LP
authors.lastname: Fried
mesh_terms: D000203:Activities of Daily Living; D000368:Aged / Q000502:physiology* / Q000523:psychology*; D000369:Aged, 80 and over; D001294:Attitude to Health; D015331:Cohort Studies; D004185:Disability Evaluation; D017079:Exercise Tolerance; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D008875:Middle Aged; D009042:Motivation; D016017:Odds Ratio; D011597:Psychomotor Performance; D012307:Risk Factors; D012648:Self Care; D012647:Self-Assessment; D011795:Surveys and Questionnaires