Table 1.
Sample characteristics at baseline imaging assessment (mean ± SD)
| Entire sample | Very healthy | |||||
|---|---|---|---|---|---|---|
| Men | Women | Total | Men | Women | Total | |
| n | 50 | 42 | 92 | 11 | 13 | 24 |
| Age (years) | 70.5 ± 6.4 | 70.4 ± 7.7 | 70.4 ± 7.0 | 71.0 ± 5.6 | 68.2 ± 5.6 | 69.5 ± 5.6 |
| Education (years) | 16.0 ± 3.2 | 16.2 ± 2.4 | 16.1 ± 2.8 | 15.8 ± 3.5 | 16.2 ± 2.3 | 16.0 ± 2.9 |
| Handedness (right/left) | 47/3 | 40/2 | 87/5 | 11/0 | 13/0 | 24/0 |
| Race (white/nonwhite) | 48/2 | 36/6 | 84/8 | 11/0 | 10/3 | 21/3 |
| MMSE1-a | 28.5 ± 1.3 | 28.8 ± 1.4 | 28.6 ± 1.4 | 28.5 ± 1.6 | 28.9 ± 1.0 | 28.8 ± 1.3 |
| BIMC1-a | 0.94 ± 1.3 | 1.0 ± 1.5 | 0.97 ± 1.4 | 0.73 ± 0.8 | 0.92 ± 1.7 | 0.83 ± 1.3 |
MMSE, Mini-Mental State Exam total score (Folstein et al., 1975). BIMC, Blessed Information Memory Concentration Scale total score (Fuld, 1978).
F1-a
MMSE and BIMC data at baseline were missing for four and one participants, respectively. Values from the next annual assessment were substituted.