Direct comparison of multilayer left ventricular global longitudinal strain using CMR feature tracking and speckle tracking echocardiography

Table 2 Comparison of global longitudinal strain measurements between CMR-FT and STE using Pearson’s correlation co-efficient, Intraclass correlation co-efficients, and Bland Altman analysis

Strain	CMR-FT	STE	r	ICC	Bias	LOA	P-value
Endocardial	− 15.31 ± 4.1	− 17.10 ± 4.2	0.685	0.626	− 1.79	± 6.4	0.585
Weighted endocardial	− 15.31 ± 4.1	− 16.41 ± 4.0	0.686	0.663	− 1.00	± 6.2	0.780
Whole layer	− 14.33 ± 3.9	− 15.15 ± 3.7	0.687	0.671	− 0.80	± 5.9	0.219
Epicardial	− 14.24 ± 3.6	− 13.26 ± 3.2	0.660	0.632	0.98	± 5.5	0.055
Weighted epicardial	− 14.24 ± 3.6	− 13.85 ± 3.4	0.661	0.657	0.39	± 5.6	0.252

For ICC values, all p < 0.001
Key: bias = mean of differences between CMR-FT and STE measurements, r = Pearson’s correlation co-efficient (all p < 0.001), LOA = limits of agreement; 1.96 × standard deviation of the differences between the two measurements, p-value is that of linear regression on Bland Altman analysis

ISSN: 1471-2261