title: A longitudinal evaluation of persons with disabilities: does a longitudinal definition help define who receives necessary care?
abstract: OBJECTIVE
  To assess, using a longitudinal definition, the impact of disability on a broad range of objective health care quality indicators.
  
  
  METHODS
  Longitudinal cohort study following up with patients over several years. The first 2 interviews, 1 year apart, were used to determine each patient's disability status in activities of daily living (ADLs). Assessment of the health care indicators commenced after the second interview and continued throughout the survey period (an additional 1-3y).
  
  
  METHODS
  National survey.
  
  
  METHODS
  Participants (N=29,074) of the Medicare Current Beneficiary Survey (1992-2001) with no, increasing, decreasing, and stable ADL disability.
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  The incidence of 5 avoidable outcomes, receipt of 3 preventive care measures, and adherence to 32 diagnostically based indicators assessing the quality of treatment for acute myocardial infarction [AMI], angina, breast cancer, cerebrovascular accident, transient ischemic attack, cholelithiasis, chronic obstructive pulmonary disease [COPD], congestive heart failure, depression, gastrointestinal bleeding, diabetes, and hypertension.
  
  
  RESULTS
  For most indicators, less than 75% of eligible patients received necessary care, regardless of disability status. For 5 indicators, less than 50% of patients received appropriate treatment. In a logistic regression analysis that controlled for patient age, sex, race, and income, disability status was a significant factor in 7 quality measures (AMI, breast cancer, COPD, diabetes, angina, pneumonia, annual visits).
  
  
  CONCLUSIONS
  Using a longitudinal definition of disability and objective health quality indicators, we found that disability status can be an important factor in determining receipt of quality health care in a broad range of diagnostic categories. However, the impact of disability status varies depending on the indicator measured. In this cohort of patients, the changing nature of a person's disability seems to have less impact than whether they ever have had any functional deficits.
authors.affiliation: Rehabilitation Medicine Department, Clinical Research Center, National Institutes of Health, Bethesda, MD 20892-1604, USA. chanle@cc.nih.gov
authors.forename: Leighton
authors.initials: L
authors.lastname: Chan
authors.forename: Marcia A
authors.initials: MA
authors.lastname: Ciol
authors.forename: Anne
authors.initials: A
authors.lastname: Shumway-Cook
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Yorkston
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Dudgeon
authors.forename: Steven M
authors.initials: SM
authors.lastname: Asch
authors.forename: Jeanne M
authors.initials: JM
authors.lastname: Hoffman
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D006233:Persons with Disabilities; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data*; D006297:Health Services Accessibility; D006306:Health Surveys; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D006278:Medicare; D020380:Needs Assessment; D019984:Quality Indicators, Health Care; D011787:Quality of Health Care; D014481:United States