Table 7.

The correlations (r) between predicted age and chronological age, R², root mean square error (RMSE), and mean absolute error (MAE) for the brain age models based on WHII and UK Biobank (UKB) sub-samples matched on sample size (N) and age range. 95% confidence intervals are indicated in square brackets. RMSE and MAE are reported in years. SD = standard deviation.

Model	N	Mean age ± SD	r	R2	RMSE	MAE
WHII	567	68.88  ±  4.22	0.06 [-0.02, 0.14]	0.004 [-0.006, 0.014]	4.27	3.48
UKB	567	67.07  ±  4.61	0.04 [-0.04, 0.12]	0.002 [-0.005, 0.008]	4.69	3.85