Table 1.
Sample characteristics
| Total sample (n = 533) | NC (n = 261) | ε4HET (n = 207) | ε4HMZ (n = 65) | P-value | |
|---|---|---|---|---|---|
| Age (y) | 57.58 (7.43) | 57.93 (7.53) | 58.22 (7.41) | 54.14 (6.18) | <0.01 |
| Sex (F/M) | 320/213 | 166/95 | 113/94 | 41/24 | 0.13 |
| Education (y) | 13.64 (3.56) | 13.69 (3.62) | 13.66 (3.53) | 13.38 (3.46) | 0.82 |
| TIV (cm3) | 1490.11 (146.07) | 1484.96 (155.17) | 1495.41 (137.73) | 1493.91 (135.20) | 0.72 |
| TPR | 24.18 (4.46) | 23.91 (4.81) | 24.23 (4.20) | 25.14 (3.69) | 0.21a |
| TFR | 16.54 (5.17) | 16.45 (5.22) | 16.29 (5.08) | 17.66 (5.15) | 0.60a |
| TDPR | 23.90 (4.60) | 23.65 (4.87) | 23.94 (4.40) | 24.82 (3.98) | 0.27a |
| TDFR | 16.89 (5.18) | 16.58 (5.35) | 16.90 (4.78) | 18.11 (5.62) | 0.29a |
| Coding | 65.50 (15.20) | 65.67 (15.83) | 64.26 (14.85) | 68.78 (13.28) | 0.63a |
Note: NC: noncarriers; ε4HET: ε4-heterozygotes; ε4HET: ε4-homozygotes; TIV: total intracranial volume; M: mean; SD: standard deviation; TPR: total paired recall; TFR: total free recall; TDPR: total delayed paired recall; and TDFR: total delayed free recall. Except for the categorical variable sex, numbers represent mean and SD.
a
Corrected for age, sex, and years of education.