Validity, intra- and inter-observer reliability of automated devices for the assessment of ankle brachial index using photo-plethysmography

Table 3 Inter-observer concordances of ABI measurements

Method	CCC	95%-CI of CCC		Bias	p-value	Correlation
VI	0.70	0.50	0.83	-0.019	0.18	0.71
VI_O	0.71	0.51	0.84	-0.032	0.017	0.73
VI_E	0.73	0.53	0.85	-0.026	0.046	0.74
VE	0.55	0.31	0.73	-0.00042	0.98	0.55
VE_O	0.49	0.23	0.69	-0.010	0.46	0.50
VE_E	0.54	0.21	0.76	-0.024	0.060	0.55
VE_D	0.56	0.16	0.89	-0.023	0.16	0.58

Agreement of first and second ABI measurement for automated methods. We present concordance correlation coefficients, corresponding confidence intervals, bias between observers, p-value of bias and correlation coefficient between observers.
VI/VE = Vicorder/Vascular Explorer standard measurements, VI_O/VE_O = Vicorder/Vascular Explorer corrected by observer, VI_E/VE_E = Vicorder/Vascular Explorer corrected by examiner, VE_D = Deflation method of Vascular Explorer.

ISSN: 1471-2261