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Table 1 Descriptive characteristics of the study population (N = 30,042a)

From: The associations of multimorbidity with the sum of annual medical and long-term care expenditures in Japan

 

n (%)

Charlson Comorbidity Indexb

 0

13,732 (45.7%)

 1

3167 (10.5%)

 2

7199 (24.0%)

 3

2254 (7.5%)

 4

1942 (6.5%)

 5

787 (2.6%)

 6

540 (1.8%)

 7

216 (0.7%)

 8

106 (0.4%)

 9

52 (0.2%)

 ≥10

47 (0.2%)

Birth year (ages as of January 1, 2012)

 1900–1914 (97–111)

162 (0.5%)

 1915–1919 (92–96)

862 (2.9%)

 1920–1924 (87–91)

2769 (9.2%)

 1925–1929 (82–86)

6201 (20.6%)

 1930–1934 (77–81)

11,137 (37.1%)

 1935–1939 (72–76)c

8911 (29.7%)

Sex

 Men

12,561 (41.8%)

 Women

17,481 (58.2%)

Household income level (n = 29,915)

 Low-income group

8823 (29.5%)

 Middle-to-high income group

21,092 (70.5%)

Level of long-term care required

 Not required

22,657 (75.4%)

 Support level 1

586 (2.0%)

 Support level 2

787 (2.6%)

 Care level 1

1574 (5.2%)

 Care level 2

1558 (5.2%)

 Care level 3

1143 (3.8%)

 Care level 4

918 (3.1%)

 Care level 5

819 (2.7%)

  1. aUnless otherwise specified
  2. bThe 2011 updated and reweighted version
  3. cWe included only those individuals who were enrolled in the Late-Stage Medical Care System for the Elderly (i.e., adults ≥75 years) in this analysis