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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