Table 1.

Number of ranked features $k_{opt}$ at which the regression models exhibit the minimum average Mean absolute error (MAE).

Harmonization Technique	NC			ASD
	SVR	RF	Lasso	SVR	RF	Lasso
No harmonization	400	90	55	150	130	35
Age covariate	1000	100	100	400	50	65
No age covariate	40	30	15	50	20	15