Table 1.

Sample characteristics at baseline imaging assessment (mean ± SD)

Entire sampleVery healthy
MenWomenTotalMenWomenTotal
n504292111324
Age (years)70.5  ± 6.470.4  ± 7.770.4  ± 7.071.0  ± 5.668.2  ± 5.669.5  ± 5.6
Education (years)16.0  ± 3.216.2  ± 2.416.1  ± 2.815.8  ± 3.516.2  ± 2.316.0  ± 2.9
Handedness (right/left)47/340/287/511/013/024/0
Race (white/nonwhite)48/236/684/811/010/321/3
MMSE1-a28.5  ± 1.328.8  ± 1.428.6  ± 1.428.5  ± 1.628.9  ± 1.028.8  ± 1.3
BIMC1-a0.94  ± 1.31.0  ± 1.50.97  ± 1.40.73  ± 0.80.92  ± 1.70.83  ± 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.