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Characteristics of the sample at baseline (n = 561).
| CN | MCI | ||
|---|---|---|---|
| Number of individuals | 160 | 401 | |
| Number of visits | Mean (SD) | 4.79 (1.97) | 5.58 (1.93) |
| Time between visits (years) | Mean (SD) | 0.89 (0.47) | 0.76 (0.33) |
| Age at baseline (years)* | Mean (SD) | 74.56 (6.31) | 73.07 (6.96) |
| Gender* | Male (%) | 43.75 | 58.35 |
| Education (years) | >12 (%) | 88.75 | 82.54 |
| APOE ε4 genotype* | Negative (%) | 56.88 | 35.41 |
| Hetero- (%) | 38.12 | 49.63 | |
| Homo- (%) | 5.00 | 14.96 |
*Significant difference (p < 0.05) between CN and MCI groups.
