Table 2.

Summary of the prediction results by diagnosis. Cor: correlation between predicted brain age and chronological age. ${\text{CI}}_{Cor}$: confidence interval for the correlation between predicted brain age and chronological age, obtained via Fisher-z transformation (Myers et al., 2013, Section 19.2). $\hat{\pi }$: sample coverage (proportion of cases for which the $90\text{\%}$ prediction interval contain the chronological age). $\ast$-pos: proportion of cases for which the chronological age is less than the lower limit of the $90\text{\%}$ prediction interval.

Diagnosis	N	MAE	RMSE	Cor	$95\text{\%}{\text{CI}}_{Cor}$	$\hat{\pi }$	$\ast$-pos
Control	229	3.49	4.43	0.48	[0.37, 0.57]	0.86	0.05
MCI	387	4.99	6.12	0.46	[0.38, 0.54]	0.68	0.24
AD	180	5.16	6.27	0.38	[0.25, 0.50]	0.64	0.28