Table 1. Characteristics of participants (n = 201, 118/83 females/males) at the two time points (Tp1 and Tp2).
| Tp1 | Tp2 | Tp2-Tp1 | |||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Difference | |
| Age | 50.0 | (16.5) | 53.6 | (16.5) | 3.6 |
| Education | 15.9 | (2.6) | 3.3 | (0.7) | NA |
| MMSE | 29.4 | (0.7) | 29.1 | (1.0) | -0.3 |
| CVLT II IR | 56.5 | (11.7) | 58.1 | (11.1) | 1.6 |
| CVLT II SDR | 12.3 | (2.9) | 12.9 | (2.9) | 0.5 |
| CVLT II DR | 12.8 | (2.9) | 13.1 | (2.7) | 0.3 |
| FSIQ | 115.8 | (8.6) | 119.1 | (9.7) | 3.3 |
| BDI | 4.5 | (3.9) | NA | NA | |
Tp2-Tp1 represents the observed changes within the sample from Tp1 to Tp2. Age = Age at MR scan; Education = years of education (note: at Tp2 we introduced a categorical classification system on a 4-point scale, with 1 = Primary school (9 years), 2 = High school (12 years), 3 = Bachelor´s degree, 4 = Master´s degree or higher); MMSE = Mini Mental State Examination (max score = 30); CVLT II IR = Total California Verbal Learning Test (Version II) immediate recall (max score = 80); CVLTII SDR = short delay recall (5 minutes) (max score = 16); CVLT II DR = delayed recall (30 minutes) (max score = 16); FSIQ = Full Scale IQ (note: 4-component WASI at Tp1 and 2-component WASI at Tp2).; BDI = Beck Depression Inventory (Tp1 only). For mean difference scores: Bold if p < 0.05.