TABLE 4.

Regression statistics between model predictions and reference values.

Model	Slope	Intercept	r	p-value	RMSE	nRMSE
RFRZao M1	0.77	0.012 mmHg.s/mL	0.89	<0.001	0.006 mmHg.s/mL	7.78%
RFRZao M2	0.77	0.013 mmHg.s/mL	0.89	<0.001	0.006 mmHg.s/mL	7.77%
RFRZao M3	0.66	0.019 mmHg.s/mL	0.81	<0.001	0.008 mmHg.s/mL	9.91%
RFRZao M4	0.55	0.025 mmHg.s/mL	0.75	<0.001	0.009 mmHg.s/mL	11.20%
RFRCT M1	0.81	0.21 mL/mmHg	0.93	<0.001	0.19 mL/mmHg	7.31%
RFRCT M2	0.80	0.22 mL/mmHg	0.93	<0.001	0.19 mL/mmHg	7.37%
RFRCT M3	0.73	0.31 mL/mmHg	0.88	<0.001	0.24 mL/mmHg	9.21%
RFRCT M4	0.63	0.42 mL/mmHg	0.82	<0.001	0.29 mL/mmHg	11.11%
ANNZao M1	0.86	0.007 mmHg.s/mL	0.90	<0.001	0.006 mmHg.s/mL	7.40%
ANNZao M2	0.77	0.012 mmHg.s/mL	0.90	<0.001	0.006 mmHg.s/mL	7.47%
ANNZao M3	0.69	0.016 mmHg.s/mL	0.83	<0.001	0.008 mmHg.s/mL	9.60%
ANNZao M4	0.56	0.022 mmHg.s/mL	0.76	<0.001	0.009 mmHg.s/mL	11.28%
ANNCT M1	0.88	0.14 mL/mmHg	0.95	<0.001	0.16 mL/mmHg	6.26%
ANNCT M2	0.89	0.17 mL/mmHg	0.94	<0.001	0.18 mL/mmHg	6.87%
ANNCT M3	0.75	0.29 mL/mmHg	0.88	<0.001	0.24 mL/mmHg	9.29%
ANNCT M4	0.64	0.45 mL/mmHg	0.83	<0.001	0.29 mL/mmHg	10.94%

RMSE, root mean square error; nRMSE, normalized RMSE.

M1 uses as inputs brSBP, brDBP, HR, cfPWV, crPWV.

M2 uses as inputs brSBP, brDBP, cfPWV, crPWV.

M3 uses as inputs MAP, cfPWV, crPWV.

M4 uses as inputs cfPWV, crPWV.