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Table 5 Bland-Altman analyses for comparisons of the 4D flow CMR aoPWV methods with Cf-PWV and BH-PWV

From: Comparison of different methods for the estimation of aortic pulse wave velocity from 4D flow cardiovascular magnetic resonance

 

Cf-PWV

BH-PWV

Mean bias (m/s)

LA (m/s)

Mean bias (m/s)

LA (m/s)

S1

TTc

−0.9

[−9.1;7.3]

0.9

[−8.3;10.1]

TTw

0.5

[−7.3;8.3]

2.2

[−5.6;10]

TTf

−1.2

[−10.4;8.0]

0.5

[−9.3;10.3]

S2

TTc

−2.3

[−6.4;1.8]

−0.5

[−6.8;5.8]

TTw

−0.5

[−5.4;4.4]

1.2

[−4.9;7.3]

TTf

−1.8

[−7.4;3.8]

−0.1

[−7.5;7.3]

S3

 

−1.4

[−5.3;2.5]

0.3

[−5.6;6.2]

  1. Bland-Altman mean biases and limits of agreement (LA) for comparisons between 4D flow MRI aoPWV values and carotid-femoral PWV (Cf-PWV) as well as the ascending aorta Bramwell-Hill PWV (BH-PWV). Bias was defined as 4D flow MRI aoPWV – Cf-PWV or BH-PWV. S1, S2 and S3: Strategies 1, 2 and 3, respectively. TTc, TTw and TTf: transit times estimated using cross-correlation, wavelets and Fourier transforms, respectively