Figure 2
Comparison of the performance between the brain age prediction algorithms in external validation set. Scatter plots show the predicted brain age versus chronological age in the external validation set (CamCAN dataset) using the combined CNN-MLP algorithm (a, blue dots), CNN-only algorithm (b, light blue dots), and brainageR algorithm (c, black dots). In both plots, the red line indicates a linear regression line and the dashed gray line indicates a y = x line (45-degree line). Abbreviations: CamCAN, Cambridge Centre for Ageing and Neuroscience; CNN, convolutional neural network; MAE, mean absolute error; MLP, multi-layer perceptron; RMSE, root mean squared error; R2, coefficient of determination.
