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Table 1 Characteristics of pre-identified and general population chronically ill samples

From: Standardizing disease-specific quality of life measures across multiple chronic conditions: development and initial evaluation of the QOL Disease Impact Scale (QDIS®)

  Pre-Identified Disease Group Pre-Identified Combined (N = 5418) Gen. Pop. Chronically Ill (N = 4120)
  Arthritis (N = 1574) CKD (N = 299) Cardiovascular (N = 639) Diabetes (N = 1326) Respiratory (N = 1580)
Age
 Mean (SD) 62.1 (11.2) 63.5 (12.8) 65.7 (10.7) 60.3 (11.9) 53.0 (16.1) 59.5 (13.7) 50.9 (16.0)
 Median 63 64 66 61 55 61 52
 Range 20–93 18–92 18–97 18–92 18–93 18–97 18–94
% Male 35.5 51.8 56.6 52.0 35.2 42.8 47.0
Race/Ethnicity
 White non-Hispanic 82.5 81.6 84.5 77.6 77.0 79.9 77.3
 Black non-Hispanic 6.9 8.0 5.3 11.1 7.3 7.9 8.9
 Hispanic 5.3 5.0 2.7 6.2 7.6 5.9 8.4
 Other non-Hispanic 5.3 5.4 7.5 5.1 8.1 6.3 5.4
Education
  < High school graduate 2.6 4.7 5.6 2.6 3.4 3.3 7.3
 High school graduate 20.5 11.7 16.3 19.1 17.8 18.4 26.5
 Some college 34.1 41.8 41.9 39.7 38.2 38.0 31.6
 College graduate 42.8 41.8 36.2 38.6 40.6 40.3 34.6
Income
  < $20,000 11.6 15.1 14.9 10.6 13.7 12.5 13.8
 $20,000–39,999 21.6 24.4 26.8 21.9 18.7 21.6 21.4
 $40,000–99,999 47.4 44.8 47.4 52.0 48.0 48.6 41.8
 $100,000+ 19.4 15.7 10.9 15.5 19.6 17.3 23.0
Employment Status
 Employed 35.9 23.7 20.0 43.4 47.0 38.4 52.4
 Unemployed 4.0 1.7 2.8 4.8 5.1 4.3 7.0
 Retired due to age 38.0 40.5 42.4 33.0 21.1 32.5 19.3
 Disableda 12.8 24.4 26.5 10.2 12.3 14.3 7.7
 Otherb 8.7 8.7 7.4 7.7 13.9 9.8 13.1
 Missing 0.6 1.0 0.9 0.8 0.5 0.7 0.5
  1. Arthritis includes osteoarthritis (N = 1066) and rheumatoid arthritis (N = 508). Cardiovascular includes angina (N = 214), recent myocardial infarction (N = 98), and congestive heart failure (N = 327). Respiratory includes asthma (N = 1175) and COPD (N = 405)
  2. Abbreviations: CKD chronic kidney disease
  3. aRetired due to disability
  4. bHomemaker, student, other