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Table 3 Proportion of samples with probable dementia and possible cognitive impairment in DYNOPTA and by by gender and by age cohort

From: Estimates of probable dementia prevalence from population-based surveys compared with dementia prevalence estimates based on meta-analyses

  

DYNOPTA

  

97NSMH

  

07NSMH

  
  

Male

Female

Total

Male

Female

Total

Male

Female

Total

Age

Dementia Category

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

Proportion

(95% CI)

65-69

Probable dementia

3.02

(0 - 7.20)

4.47

(0.55 - 8.39)

3.78

(0.87 - 6.69)

6.72

(2.27 - 11.18)*

5.70

(2.58 - 8.83)

6.22

(3.13 - 9.32)***

04.63

(0.67 - 8.59)

3.43

(0.02 - 6.83)

4.00

(1.51 - 6. 50)*

 

Possible cognitive impairment

5.92

(1.33 - 10.51)

3.74

(0 - 7.92)

4.78

(1.63 - 7.93)

18.65

(13.53 - 23.78)

11.07

(7.32 - 14.82)

14.91

(11.69 - 18.13)

5.72

(2.85 - 8.59)

6.35

(3.43 - 9.28)

6.05

(4.00 - 8.11)

 

Not Impaired

91.06

(85.77 - 96.35)

91.79

(86.37 - 97.21)

91.44

(87.60 - 95.28)

74.62

(68.15 - 81.08)

83.23

(78.50 - 87.95)

78.86

(74.56 - 83.17)

89.65

(84.71 - 94.59)

90.22

(86.36 - 94.08)

89.95

(87.03 - 92.86)

70-74

Probable dementia

6.22

(3.14 - 9.30)

4.30

(0.75 - 7.84)

5.16

(2.57 - 7.74)

11.16

(5.55 - 16.77) *

7.66

(3.66 - 11.66)

9.09

(5.42 - 12.77)*

4.34

(1.39 - 7.29)

5.70

(2.05 - 9.36)

5.02

(2.47 - 7.58)***

 

Possible cognitive impairment

18.95

(15.16 - 22.75)

16.22

(11.16 - 21.28)

17.44

(14.29 - 20.59)

21.13

(14.39 - 27.87)

13.53

(9.45 - 17.61)

16.64

(12.94 - 20.35)

11.66

(6.42 - 16.90)

7.07

(3.20 - 10.95)

9.35

(6.38 - 12.32)

 

Not Impaired

74.83

(70.57 - 79.09)

79.49

(74.77 - 84.20)

77.40

(74.23 - 80.57)

67.71

(59.72 - 75.69)

78.82

(73.37 - 84.26)

74.26

(69.34 - 79.18)

84.00

(78.77 - 89.23)

87.23

(82.32 - 92.13)

85.63

(82.16 - 89.14)

75+

Probable dementia

15.33

(12.90 - 17.76)

16.15

(13.70 - 18.59)

15.84

(14.03 - 17.65)

8.70

(0.99 - 16.41) *

14.69

(8.54 - 20.83)

12.63

(6.41 - 18.85)

8.51

(4.61 - 12.42)

4.91

(2.91 - 6.92)

6.55

(4.50 - 8.59)**

 

Possible cognitive impairment

24.75

(21.01 - 28.49)

23.25

(20.04 - 26.46)

23.81

(21.42 - 26.20)

29.01

(22.49 - 35.53)

22.11

(17.75 - 26.48)

24.48

(20.83 - 28.13)

11.14

(7.63 - 14.64)

14.29

(9.63 - 18.95)

12.86

(9.96 - 15.75)

 

Not Impaired

59.92

(56.24 - 63.59)

60.60

(56.95 - 64.25)

60.35

(57.63 - 63.06)

62.29

(52.94 - 71.64)

63.20

(56.14 - 70.26)

62.89

(56.08 - 69.69)

80.35

(75.02 - 85.68)

80.80

(76.08 - 85.52)

80.59

(77.10 - 84.09)

75-79

Probable dementia

10.74

(7.61 - 13.87)

10.55

(7.17 - 13.93)

10.63

(8.27 - 12.99)

-

-

-

11.26

(4.97 - 17.56)*

4.20

(1.39 - 7.01)

7.53

(4.07 - 10.99)***

 

Possible cognitive impairment

21.04

(16.44 - 25.64)

19.00

(14.75 - 23.26)

19.85

(16.75 - 22.94)

-

-

-

9.12

(4.52 - 13.72)

11.37

(5.53 - 17.20)

10.31

(6.24 - 14.38)

 

Not Impaired

68.22

(63.33 - 73.11)

70.45

(65.47 - 75.42)

69.52

(65.92 - 73.13)

-

-

-

79.61

(4.52 - 13.72)

84.43

(78.41 - 90.46)

82.16

(77.20 - 87.13)

80-84

Probable dementia

16.92

(12.40 - 21.44)

15.97

(11.44 - 20.49)

16.32

(12.99 - 19.64)

-

-

-

4.55

(0.86 - 8.24)

5.79

(2.79 - 8.79)

5.26

(3.06 - 7.45)***

 

Possible cognitive impairment

28.47

(20.15 - 36.78)

24.23

(18.96 - 29.51)

25.79

(21.33 - 30.25)

-

-

-

14.04

(6.97 - 21.11)

17.87

(10.87 - 24.87)

16.22

(11.61 - 20.83)

 

Not Impaired

54.61

(47.14 - 62.09)

59.80

(53.83 - 65.78)

57.90

(53.22 - 62.58)

-

-

-

81.41

(74.37 - 88.45)

76.34

(69.48 - 83.20)

78.53

(73.75 - 83.30)

85-89

Probable dementia

25.13

(17.82 - 32.44)

21.02

(14.37 - 27.67)

22.36

(17.49- 27.24)

-

-

-

   
 

Possible cognitive impairment

31.71

(21.56 - 41.86)

31.27

(22.14 - 40.39)

31.41

(24.34 - 38.49)

-

-

-

   
 

Not Impaired

43.16

(34.59 - 51.73)

47.71

(38.71 - 56.71)

46.23

(39.00 - 53.45)

-

-

-

   

90-94

Probable dementia

41.27

(23.71 - 58.83)

29.89

(19.25 - 40.52)

32.43

(23.40 - 41.46)

      
 

Possible cognitive impairment

26.95

(13.61 - 40.29)

35.30

(23.74 - 46.87)

33.43

(23.91 - 42.96)

      
 

Not Impaired

31.78

(17.42 - 46.14)

34.81

(23.60 - 46.01)

34.13

(24.83 - 43.43)

      

90+

Probable dementia

42.96

(26.88 - 59.05)

41.03

(31.27 - 50.80)

41.41

(33.08 - 49.74)

-

-

-

   
 

Possible cognitive impairment

28.20

(16.37 - 40.03)

29.48

(19.92 - 39.04)

29.23

(21.19 - 37.27)

-

-

-

   
 

Not Impaired

28.84

(15.97 - 41.70)

29.48

(20.22 - 38.75)

29.36

(21.52 - 37.20)

-

-

-

   

95+

Probable dementia

52.75

(10.75 - 94.75)

69.39

(52.56 - 86.23)

67.52

(51.69 - 83.36)

      
 

Possible cognitive impairment

35.46

(0 - 75.17)

14.67

(0.93 - 28.41)

17.01

(4.59 - 29.43)

      
 

Not Impaired

11.79

(0 - 33.86)

15.94

(1.23 - 30.65)

15.47

(2.55 - 28.40)

      
  1. * p < .05; ** p < .01; *** p < .001 Chi-Square analyses between gender and MMSE category reported in Male column. Chi-Square analyses between Study and MMSE category reported in Total column under the NMHS surveys (ref is DYNOPTA). Yates' correction used where appropriate