fig4

Figure 4. Analysis of the model performance across various age groups, with error bars representing the SDs of MAEs for each group. Significant testing was performed among age groups for each of the four models. *: the predicted Mean Absolute Errors (MAEs) for the last age group are significantly different from those of the other groups across each model, achieving statistical significance with a P-value of less than 0.01 (P < 0.01).