TABLE 3.

Results and reproducibility of key parameters measured at 2 visits.

	Visit 1			Visit 2			Reproducibility
Variables	N	Mean	SD	N	Mean	SD	Mean difference	LOA	LOA	rho	Reliability grading
Systolic BP, mm Hg	34	136.6	10.1	34	134.4	13.8	2.1	−23.5	27.7	0.42	Fair
Diastolic BP, mm Hg	34	82.7	10.0	34	80.8	8.7	1.9	−13.5	17.2	0.64	Good
Heart rate, bpm	34	63.4	9.6	34	61.1	9.9	2.3	−10.6	15.2	0.75	Excellent
maximum Pres, mm Hg	31	113.1	8.7	29	111.7	11.8	0.9	−19.4	21.2	0.48	Fair
maximum Pxs, mm Hg	31	36.4	9.1	29	36.1	10.1	0.3	−13.8	14.5	0.71	Good
Time maximum Pxs, s	31	0.10	0.01	29	0.10	0.01	0.00	−0.03	0.03	0.24	Poor
Time maximum BP, s	31	0.14	0.04	34	0.14	0.04	0.00	−0.09	0.09	0.39	Poor
ks, s–1	31	7.90	2.31	29	7.65	1.78	0.01	−3.73	3.80	0.55	Fair
kd, s–1	31	2.68	1.08	29	3.11	2.87	0.24	−1.55	2.02	0.54	Fair
Pzf, mm Hg	31	74.1	11.3	29	69.3	20.4	1.13	−16.8	19.1	0.66	Good
Wf1, AU	31	90	47	29	100	38	−11.6	−77.7	54.5	0.61	Good
Wb, AU	31	10	6	29	12	5	−1.8	−8.2	4.7	0.68	Good
Wf2, AU	31	29	19	29	21	8	6	−24.8	36.7	0.34	Poor
WRI	31	0.14	0.11	29	0.12	0.04	0.02	−0.17	0.21	0.44	Fair
Pb/Pf	31	0.72	0.04	29	0.71	0.04	0.00	−0.08	0.08	0.53	Fair
RI	31	0.42	0.01	29	0.42	0.01	0.00	−0.03	0.03	0.52	Fair

AU, arbitrary units; BP, blood pressure; k_d, diastolic rate constant; k_s, systolic rate constant; LOA, 95% limits of agreement; P_b/P_f, ratio of backward to forward pressure; P_res, reservoir pressure; P_xs, excess pressure; P_zf, estimated zero-flow pressure; rho, Lin’s concordance coefficient; RI, reflection index; V_max, maximum aortic velocity; Wb, backward compression wave; Wf1, forward compression wave; Wf2, forward decompression wave; WRI, wave reflection index.