TABLE 3.

Comparison of the estimations based on PLSR in this study to those based on elastic net listed on the HCP website^∗.

		Education	Grip strength	Reading recognition	Picture vocabulary	VSPLOT
PLSR	R	0.400	0.704	0.519	0.546	0.382
	CoD	0.156	0.494	0.269	0.297	0.136
Elastic net	R	0.28	0.65	0.16	0.27	0.25
	CoD	–0.05	0.34	–0.19	–0.18	–0.01

^∗https://db.humanconnectome.org/megatrawl/3T_HCP820_MSMAll_d200_ts2/megatrawl_1/. The estimation accuracies of the other five CBD variables (age, gender, CSFC, CSCC, and CSOC) were not available on the HCP website. Our results were based on the third set of estimations. The estimations based on PLSR in this study were better than those based on elastic net as listed on the HCP website. CoD stands for “coefficient of determination,” which has been used to evaluate the performance of the predictive models together with the R-value on the HCP website. CoD is evaluated as follows: CoD = 1 – Variance of Estimation Error/Variance of the Variable, and higher CoD values indicate better estimations.