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Table 3 Incidence of new cases of Alzheimer’s disease by 1,000 person-years and by clinical and pathological classifications

From: Fitting the epidemiology and neuropathology of the early stages of Alzheimer’s disease to prevent dementia

  Incidence/1,000 person-years
  Clinical classification Pathological classification
Age group Preclinical Prodromal Dementia Thal1 Thal2 Thal3
40 to 44 24.01 0.13 0.00 23.07 1.68 1.11
45 to 49 5.61 0.31 0.00 5.61 2.58 0.68
50 to 54 7.53 0.64 0.16 7.53 4.98 1.54
55 to 59 18.51 1.45 0.46 18.51 10.00 2.44
60 to 64 27.60 3.49 0.70 27.60 16.98 3.32
65 to 69 32.76 7.65 1.87 32.76 18.13 7.08
70 to 74 10.43 16.24 4.22 10.43 28.14 12.14
75 to 79 10.34 32.65 7.50 10.34 28.72 14.21
80 to 84 10.10 57.29 15.27 10.10 10.51 20.27
85 to 89 13.80 16.98 35.33 13.80 11.22 26.84
90 to 94 12.09 22.32 61.83 12.09 12.09 36.26
>95 33.85 23.44 109.38 33.85 49.48 104.17