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Table 1 Characteristics of sample

From: Determinants of health care costs in the senior elderly: age, comorbidity, impairment, or proximity to death?

  80–84 85–89 90–94 95–99 100+ p valuea
Person years 93,317 107,394 72,476 22,943 4542  
Female 45,439 (49) 55,922 (52) 43,528 (60) 17,567 (77) 3688 (81) <0.001
Last year of life 3668 (4) 7883 (7) 9215 (13) 4686 (20) 1087 (24) <0.001
Number of comorbidities
 0 1945 (2) 2168 (2) 1561 (2) 784 (3) 484 (11) <0.001
 1–3 36,842 (39) 39,344 (37) 26,679 (37) 9677 (42) 2132 (47) 0.003
 4–6 51,591 (55) 62,138 (58) 42,018 (58) 11,981 (53) 1857 (41) <0.001
 7+ 2939 (3) 3744 (3) 2218 (3) 500 (2) 69 (1) <0.001
Number of impairments
 0 15,266 (16) 13,879 (13) 7513 (10) 2154 (9) 736 (16) <0.001
 1–3 64,405 (69) 70,766 (66) 44,722 (62) 13,070 (57) 2394 (53) <0.001
 4–6 12,944 (14) 21,151 (20) 18,452 (25) 6943 (30) 1275 (28) <0.001
 7+ 702 (1) 1598 (1) 1788 (3) 775 (3) 137 (3) <0.001
  1. Figures are frequencies (column percents)
  2. aTest for trend across age groups