title: Self-reported causes of physical disability in older people: the Cardiovascular Health Study. CHS Collaborative Research Group.
abstract: OBJECTIVE
  To determine the major conditions and symptoms reported to cause difficulty in 17 physical tasks of daily life and the criterion validity of self-report of diseases given as the causes of the difficulty in functioning, in community-dwelling older people.
  
  
  METHODS
  Cross sectional analyses of data obtained in an observational cohort study.
  
  
  METHODS
  Research clinics in four US communities: Winston-Salem, NC, Hagerstown, MD, Pittsburgh, PA, and Sacramento, CA.
  
  
  METHODS
  5201 community-dwelling people > or = 65 years old.
  
  
  RESULTS
  Arthritis and other musculoskeletal diseases were given as the primary causes of difficulty in performing physical tasks by 49.0% of the participants reporting difficulty in any task, followed by heart disease (13.7%), injury (12.0%), old age (11.7%), lung disease (6.0%), and stroke (2.9%). The self-reports of diseases that caused disability varied by task. Whereas arthritis was given as a cause of difficulty in most of the 17 different tasks, heart and lung disease were more likely to be reported as causing difficulty with activities requiring high aerobic work capacity such as walking one-half mile or doing heavy housework. Stroke was more likely to be reported as causing difficulty with use of the upper extremities and in performing basic activities of daily living. There was a high degree of consistency (91%) between the diseases and symptoms reported to cause disabilities. The percentage of people who reported a disease as the cause of their difficulty performing a task and had independent confirmation of the diagnosis was 85% in men and 71% in women, and varied according to type of disease and the individual's cognitive status and health status.
  
  
  CONCLUSIONS
  These data suggest that age-related chronic diseases are important causes of disability in older people but that the type of disability is dependent on the underlying disease that causes the disability. Also, self-report of the cause of disability appears to be generally accurate but is influenced by gender, health status, and type of disease.
authors.affiliation: Department of Internal Medicine, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, NC 27157-1051.
authors.forename: W H
authors.initials: WH
authors.lastname: Ettinger
authors.forename: L P
authors.initials: LP
authors.lastname: Fried
authors.forename: T
authors.initials: T
authors.lastname: Harris
authors.forename: L
authors.initials: L
authors.lastname: Shemanski
authors.forename: R
authors.initials: R
authors.lastname: Schulz
authors.forename: J
authors.initials: J
authors.lastname: Robbins
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D001168:Arthritis / Q000503:physiopathology; D002318:Cardiovascular Diseases / Q000503:physiopathology; D002908:Chronic Disease; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D006233:Persons with Disabilities / Q000145:classification*; D005260:Female; D006304:Health Status; D006306:Health Surveys; D006331:Heart Diseases / Q000503:physiopathology; D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology; D008297:Male; D015588:Observer Variation; D015203:Reproducibility of Results; D012307:Risk Factors; D012737:Sex Factors; D014481:United States