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Table 1 Sample distribution by study sample, CLHLS 2000, 2002, 2005, and 2008/2009

From: Self-perceived uselessness is associated with lower likelihood of successful aging among older adults in China

Variables

% a

Self-perceived uselessness categories (percentages)

Always

Often

Sometimes

Seldom

Never

Unable to answer

Total (n)

29,954 b

6.8

14.2

34.1

19.9

18.6

6.4

Successful aging indicators at follow-ups

 ADL dependent

26.9

8.0

16.2

32.6

16.0

13.9

13.3

 ADL independent

73.1

6.3

13.4

34.6

21.4

20.4

4.9

 IADL dependent

69.1

7.5

15.6

33.9

18.5

15.8

8.7

 IADL independent

30.9

5.1

10.9

34.3

23.1

25.3

1.3

 Cognitively impaired

39.8

7.8

15.9

33.7

16.6

13.5

12.5

 Cognitively unimpaired

60.2

6.1

13.0

34.3

22.1

22.1

2.4

 Not good life satisfaction

45.1

7.7

15.4

34.7

18.4

15.6

8.2

 Good life satisfaction

54.9

6.0

13.1

33.6

21.2

21.1

5.0

 Not good self-rated health

57.5

7.4

15.5

35.1

18.4

15.6

8.0

 Good self-rated health

42.5

5.9

12.3

32.6

22.0

22.9

4.3

Covariates

 Age (years) (mean)

83.6 c

--

--

--

--

--

--

 Women

55.2

7.5

16.0

35.0

18.2

15.2

8.1

 Men

44.8

5.8

11.9

33.0

22.0

22.9

4.4

 Rural

54.5

7.6

15.7

34.8

19.6

15.2

7.1

 Urban

45.5

5.7

12.3

33.2

20.3

22.9

5.6

 Non-Han ethnicity

6.6

3.6

10.9

37.0

22.9

19.0

6.6

 Han ethnicity

93.4

7.0

14.4

33.9

19.7

18.6

6.4

 Non-white collar occupation

91.1

6.9

14.8

34.7

19.7

17.1

7.8

 White collar occupation

8.9

4.8

7.9

28.1

21.9

34.4

2.9

 Economic dependence

67.2

7.3

15.8

35.1

18.9

14.5

8.4

 Economic independence

32.8

5.5

10.9

32.1

21.9

27.1

2.5

 0 years of schooling

58.4

7.7

16.4

34.8

18.3

14.3

8.6

 1–6 years of schooling

30.8

5.8

12.0

34.4

22.2

21.8

3.9

 7+ years of schooling

10.8

4.3

8.3

29.8

22.1

33.4

2.2

 Currently not married

62.5

7.3

15.5

34.3

18.4

15.7

8.7

 Currently married

38.5

5.8

12.0

33.7

22.3

23.4

2.8

 Non-coresidence with children

38.9

7.6

15.1

34.3

19.4

20.0

3.5

 Coresidence with children

61.1

6.2

13.5

33.9

20.2

17.8

8.3

 Currently nonsmoking

79.4

6.9

14.5

34.1

19.4

18.1

7.0

 Currently smoking

20.6

6.1

12.9

34.0

21.6

21.1

4.4

 No current alcohol consumption

78.4

7.1

14.8

34.2

19.4

17.6

6.9

 Current alcohol consumption

21.6

5.5

11.8

33.6

21.8

22.6

4.8

 No regular exercise

64.2

7.7

16.2

35.3

18.3

14.5

8.0

 Regular exercise

35.8

5.1

10.5

32.0

22.7

26.2

3.6

 Not optimistic

25.6

8.8

18.5

32.3

12.3

7.3

20.8

 Optimistic

74.4

6.1

12.7

34.7

22.5

22.6

1.5

 Wave 2000

19.4

5.2

12.4

34.3

20.3

16.1

11.7

 Wave 2002

27.9

8.3

14.6

33.4

17.4

15.6

10.7

 Wave 2005

25.1

8.4

15.0

32.3

16.8

16.0

11.5

 Wave 2008

27.6

7.2

16.6

29.0

17.1

14.9

15.2

  1. arefers to percentages unless otherwise stated. All percentages in the table refer to observations of 29,954 from 19,070 individuals who had at least one follow-up from 2000 to 2011/2012. bsample size; c, mean age. c --, not applicable. The distributions of 19,070 individuals at their baseline are similar to what are presented in the table. All distributions refer to the pooled data from 2000 to 2008/2009