Table 4.

Mean values of RMSE, MAE, and $R^2$ when the input was a single signal and when it was a combination of multiple signals.

Input	SBP (mmHg)			DBP (mmHg)
	RMSE	MAE	mean ${\mathbf{R}}^{\mathbf{2}}$	RMSE	MAE	mean ${\mathbf{R}}^{\mathbf{2}}$
Single signal	7.04	5.47	0.24	5.39	4.19	0.21
Multiple signals	6.21	4.78	0.40	4.83	3.76	0.35