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Table 2. 

Age and Diagnosis Characteristics of Subjects at the Time of Their Initial Visit

Age Group
N
Nondemented
Demented
n
Mean
Male
Female
Convert
n
Mean
Male
Female
CDR 0.5/1
60s 34 23 65.71 17 11 65.67 8/3 
70s 71 35 74.91 11 24 36 73.97 20 16 29/7 
80s 41 26 84.30 17 15 82.33 13/2 
90s 92.50 93.00 1/1 
Total 150 86 75.82 26 59 14 64 74.95 36 29 52/13 
Age Group
N
Nondemented
Demented
n
Mean
Male
Female
Convert
n
Mean
Male
Female
CDR 0.5/1
60s 34 23 65.71 17 11 65.67 8/3 
70s 71 35 74.91 11 24 36 73.97 20 16 29/7 
80s 41 26 84.30 17 15 82.33 13/2 
90s 92.50 93.00 1/1 
Total 150 86 75.82 26 59 14 64 74.95 36 29 52/13 

The Convert column indicates individuals who were determined to have AD on a subsequent visit. CDR = Clinical Dementia Rating, with 0, 0.5, and 1 corresponding to nondemented, very mild, and AD, respectively. CDR 0.5 individuals may be considered to represent those elsewhere labeled as “mild cognitive impairment” (MCI).

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