Table 1 NACC sample characteristics

Number of subjects

10,741

5883

6814

–

Age, yr, mean (SD)

71.92 (9.40)

73.87 (8.93)

75.28 (9.28)

<0.001

Education,^a yr, mean (SD)

15.74 (2.86)

15.21 (3.21)

14.53 (3.30)

<0.001

Female sex, n (%)

7047 (65.6)

2907 (49.4)

3689 (54.1)

<0.001

White race,^a n (%)

8713 (81.3)

4682 (79.8)

5639 (82.8)

<0.01

Global CDR, mean (SD)

0.05 (0.15)

0.46 (0.17)

1.02 (0.57)

<0.001

MMSE, mean (SD)

28.88 (1.41)

27.11 (2.43)

20.92 (5.50)

<0.001

Logical Memory-II raw score, mean (SD)

12.17 (4.13)

6.92 (4.64)

1.82 (2.88)

<0.001