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Table 2 Population estimates by stages assigned according to alternative strategies for classifying those who do not do Instrumental Activities of Daily Living (IADLs) for reasons other than health or physical problems

From: Understanding non-performance reports for instrumental activity of daily living items in population analyses: a cross sectional study

IADL stage

Multiple imputation strategy

Complete case strategya

Low prevalence estimate strategyb

High prevalence estimate strategyc

% (std)

% (std)

% (std)

% (std)

Total Population

 0

57.2 (0.8)

57.9 (0.8)

60.0 (0.8)

52.2 (0.8)

 I

19.6 (0.5)

18.1 (0.5)

17.6 (0.5)

20.2 (0.5)

 II

9.8 (0.3)

9.6 (0.4)

9.2 (0.3)

11.9 (0.4)

 III

11.1 (0.3)

11.9 (0.4)

10.8 (0.3)

13.0 (0.4)

 IV

2.3 (0.2)

2.6 (0.2)

2.3 (0.1)

2.7 (0.2)

Gender = Male

 0

62.8 (0.9)

64.1 (0.9)

66.7 (0.8)

55.6 (0.9)

 I

15.2 (0.6)

12.7 (0.6)

12.7 (0.5)

15.0 (0.6)

 II

8.1 (0.4)

7.6 (0.3)

7.1 (0.3)

12.7 (0.4)

 III

12.0 (0.5)

13.4 (0.6)

11.6 (0.5)

14.4 (0.6)

 IV

1.9 (0.2)

2.2 (0.2)

1.9 (0.2)

2.4 (0.2)

Gender = Female

 0

52.6 (0.9)

53.1 (1.0)

54.6 (0.9)

49.4 (0.9)

 I

23.4 (0.6)

22.2 (0.6)

21.7 (0.6)

24.6 (0.6)

 II

11.0 (0.5)

11.1 (0.5)

10.9 (0.5)

11.3 (0.5)

 III

10.4 (0.4)

10.7 (0.4)

10.2 (0.4)

11.8 (0.4)

 IV

2.7 (0.2)

2.9 (0.2)

2.7 (0.2)

2.9 (0.2)

  1. aDoes not do for reason other than health or physical problem is not included in the subsample
  2. bDoes not do for reason other than health or physical problem coded as “no difficulty”
  3. cDoes not do for reason other than health or physical problem coded as “difficulty”