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Table 3 Estimates of IADL disability-free life expectancy and their proportions to life expectancy at different ages

From: Age trajectories of disability in instrumental activities of daily living and disability-free life expectancy among middle-aged and older adults in Taiwan: an 11-year longitudinal study

 

Men

Women

Age

Life Expectancya

(a)

Disability-free Life Expectancy (b)

(b)/(a) (%)

Life Expectancy

(a)

Disability-free Life Expectancy (b)

(b)/(a) (%)

50 years old

 Late-onset group

35.7

28.1

78.6

41.4

29.7

71.8

 Early-onset group

29.3

16.3

55.5

34.8

17.0

48.7

55 years old

 Late-onset group

31.1

23.4

75.1

36.6

24.9

68.0

 Early-onset group

24.9

11.7

46.8

30.2

12.2

40.4

60 years old

 Late-onset group

26.6

18.8

70.5

32.0

20.2

63.0

 Early-onset group

20.8

7.7

36.9

25.8

8.1

31.2

65 years old

 Late-onset group

22.4

14.4

64.2

27.5

15.6

56.6

 Early-onset group

16.9

4.6

27.2

21.6

4.8

22.5

  1. aLife expectancy at different ages was computed by life table where a mortality rate, M, at different ages, AGE, were estimated using Gompertz model: ln (MAGE,GROUP,SEX) = −11.247 + 0.099 x AGE + 0.689 x GROUP + (−0.592) x SEX, where GROUP denotes trajectory group memberships (0 = late onset, 1 = early onset), and SEX is sex (1 = female, 0 = male)