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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