Table 1.
Characteristics of data sets derived from the population-based Rotterdam Study
| Train | Validation | Test* | Incident dementia* | |
| Nsubj | 3688 | 1099 | 550 | 159 |
| Nimg | 5865 | 2353 | 550 | 159 |
| Mean age† (years ± SD) | 66.09 ± 10.76 | 64.84 ± 9.69 | 64.85 ± 10.82 | 77.33 ± 7.15 |
| Sex proportion† (female/male) | 0.55/0.45 | 0.54/0.46 | 0.55/0.45 | 0.58/0.42 |
| Education† (years ± SD) | 12.64 ± 3.89 | 12.63 ± 3.81 | 12.58 ± 4.00 | 11.43 ± 3.57 |
| GM volume† (liters ± SD) | 0.60 ± 0.06 | 0.60 ± 0.06 | 0.60 ± 0.06 | 0.55 ± 0.05 |
| ICV† (liters ± SD) | 1.48 ± 0.16 | 1.47 ± 0.16 | 1.48 ± 0.16 | 1.45 ± 0.17 |
| Hippocampal volume (mL ± SD) | 3.9 ± 05 | 3.8 ± 05 | 3.9 ± 05 | 3.3 ± 05 |
| WMH volume (mL ± SD) | 3.9 ± 4.6 | 3.6 ± 4.1 | 3.6 ± 3.8 | 7.8 ± 7.7 |
| APOE ε4 carriership† (0/1/2) | 0.72/0.26/0.02 | 0.72/0.25/0.02 | 0.74/0.23/0.03 | 0.57/0.36/0.06 |
| Follow-up time† (years ± SD) | 5.42 ± 2.81 | 4.93 ± 2.80 | 6.68 ± 2.29 | 4.29 ± 2.26 |
Milliliter (mL); number of subjects (Nsubj); number of images (Nimg); GM; ICV.
*
Selection only includes baseline image of subjects.
†
Values are based on Nimg.