Table 2 Sample characteristics
From: White matter microstructure is altered in cognitively normal middle-aged APOE-ε4 homozygotes
Total sample (N = 532) | NC (n = 257) | HE (n = 207) | HO (n = 68) | Inferential statistics | |||||
|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
Age, years | 58.13 | 7.46 | 58.52 | 7.62 | 58.71 | 7.41 | 54.94 | 6.22 | F = 7.37; p < 0.01 |
Education, years | 13.61 | 3.54 | 13.61 | 3.60 | 13.59 | 3.52 | 13.38 | 3.48 | F = 0.19; p = 0.83 |
MMSE score | 29.06 | 1.05 | 29.00 | 1.12 | 29.02 | 1.11 | 29.26 | 0.78 | F = 1.45; p = 0.24 |
TFRa | 16.46 | 5.16 | 16.32 | 5.20 | 16.24 | 5.09 | 17.73 | 5.16 | F = 2.25; p = 0.11 |
TPRa | 24.13 | 4.48 | 23.83 | 4.85 | 24.16 | 4.19 | 25.19 | 3.71 | F = 2.36; p = 0.10 |
Males/females, n | 211/321 | 92/165 | 94/113 | 25/43 | χ2 = 4.79; p = 0.09 | ||||