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. Author manuscript; available in PMC: 2013 Sep 24.
Published in final edited form as: JAMA. 2008 Apr 23;299(16):1922–1928. doi: 10.1001/jama.299.16.1922

TABLE 1.

Demographic and health characteristics of community-dwelling Medicare beneficiaries, 2004-2006a

2004
N=14,500
2005
N=14,701
2006
N=14,732
Characteristic % (95% CI) % (95% CI) % (95% CI)
Sex
  Female 55.8 (55.0, 56.6) 55.8 (54.9, 56.6) 55.2 (54.2, 56.1)
Ageb
  Under 55 7.9 (7.4, 8.5) 7.8 (7.3, 8.2) 8.0 (7.4, 8.6)
  55–64 7.0 (6.4, 7.6) 7.3 (6.7, 8.0) 7.5 (6.9, 8.2)
  65–74 42.7 (41.9, 43.6) 42.5 (41.6, 43.3) 42.5 (41.7, 43.4)
  75–84 32.2 (31.3, 33.1) 32.4 (31.6, 33.2) 31.6 (30.9, 32.2)
  85 and over 10.2 (9.7, 10.6) 10.1 (9.7, 10.5) 10.4 (10.0, 10.9)
Income, $
  Less than $25,000 58.9 (57.1, 60.6) 57.5 (55.8, 59.1) 55.1 (53.4, 56.8)
Race
  African American 9.7 (8.1, 11.5) 9.4 (7.9, 11.2) 9.4 (7.9, 11.2)
  White 83.9 (82.0, 85.6) 84.3 (82.4, 86.0) 84.0 (82.4, 85.6)
  Other 6.4 (5.7, 7.3) 6.4 (5.6, 7.2) 6.5 (5.8, 7.4)
Hispanic or Latino
  Hispanic 7.8 (6.7, 9.1) 7.7 (6.6, 8.9) 7.8 (6.7, 9.1)
Education
  Above high school 41.0 (39.2, 42.9) 42.1 (40.2, 44.1) 42.6 (40.7, 44.5)
  High school diploma 30.4 (29.1, 31.8) 30.4 (29.0, 31.9) 30.9 (29.7, 32.1)
  No high school 28.6 (27.2, 30.0) 27.5 (26.0, 29.0) 26.6 (25.2, 28.0)
Number of morbiditiesc
  0–1 28.1 (27.0, 29.1) 26.5 (25.5, 27.5) 25.9 (24.9, 27.0)
  2–3 47.9 (46.9, 48.9) 47.0 (46.1, 47.9) 48.1 (47.1, 49.1)
  4+ 24.0 (23.2, 24.9) 26.5 (25.6, 27.5) 26.0 (25.0, 27.0)
Number of limitations in
  0 70.7 (69.3, 72.0) 70.0 (68.9, 71.2) 69.9 (68.3, 71.6)
  1–2 20.6 (19.6, 21.7) 21.0 (20.0, 22.1) 20.4 (19.2, 21.6)
  3+ 8.7 (7.9, 9.6) 8.9 (8.3, 9.7) 9.7 (8.9, 10.6)
Self-reported health status
  Excellent, very good, or good 73.0 (72.0, 74.1) 73.2 (72.1, 74.3) 73.3 (72.2, 74.5)
  Fair or poor 27.0 (25.9, 28.1) 26.8 (25.7, 27.9) 26.7 (25.6, 27.8)

Abbreviation: ADLs, activities of daily living

a

Percentage bases excluded those with missing values. Drug coverage type was missing for 3.5% of respondents; other characteristics missing for no more than 2%. Percentages calculated with national survey weights.

b

Respondents aged less than 65 years were defined as disabled.

c

Morbidity categories included cardiac disease, hypertension, cerebrovascular disease, lung disease, cancer, diabetes mellitus, arthritis, psychiatric disorder or depression, dementia, and other neurological conditions.

d

Limitations in ADLs indicate reduced functional status.