TABLE 1.
Age, predicted age, brain age gap (BAG), and prediction error by subject and field strength.
| Subject | Field strength | N observations | Mean age | SD age | Mean prediction | SD prediction | Mean BAG | SD BAG | MAE | RMSE |
|---|---|---|---|---|---|---|---|---|---|---|
| BBSC1 | 3T | 38 | 30.66 | 0.38 | 28.13 | 1.25 | −2.52 | 1.20 | 2.55 | 2.79 |
| BBSC2 | 3T | 40 | 28.09 | 0.38 | 24.37 | 0.95 | −3.72 | 1.03 | 3.72 | 3.85 |
| BBSC3 | 3T | 25 | 40.66 | 0.28 | 30.87 | 1.37 | −9.79 | 1.46 | 9.79 | 9.89 |
| FTHP1 | 3T | 153 | 49.86 | 0.54 | 45.71 | 3.70 | −4.15 | 3.52 | 4.31 | 5.44 |
| FTHP1 | 1.5T | 394 | 49.64 | 0.46 | 48.39 | 2.52 | −1.25 | 2.54 | 2.15 | 2.83 |
The presented data refer to the longitudinal, densely sampled data of few individuals.
BAG, brain age gap; MAE, mean absolute error; RMSE, root mean squared error. BAG is calculated as the difference between predicted age and age.