Table 2

Intra-observer concordances of ABI measurements
Method CCC 95%-CI of CCC Bias p-value Correlation
VI 0.65 0.46 0.78 0.015 0.29 0.65
VI_O 0.68 0.51 0.80 0.001 0.95 0.68
VI_E 0.65 0.47 0.78 0.006 0.65 0.66
VE 0.65 0.50 0.76 -0.011 0.43 0.66
VE_O 0.75 0.59 0.85 -0.004 0.75 0.75
VE_E 0.76 0.57 0.87 -0.002 0.89 0.76
VE_D 0.57 0.27 0.78 0.021 0.12 0.59

Agreement of first and second ABI measurement for automated methods. We present concordance correlation coefficients, corresponding confidence intervals, bias between first and second measurements (values less than zero mean lower values at first measurement), p-value of bias and correlation coefficient of first and second measurement.

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.

Teren et al.

Teren et al. BMC Cardiovascular Disorders 2013 13:81   doi:10.1186/1471-2261-13-81

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