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Table 3 Inter- technique agreement of 2D and 3D global and regional strain values

From: Comprehensive evaluation of left ventricular deformation using speckle tracking echocardiography in normal children: comparison of three-dimensional and two-dimensional approaches

Variables

Bland Altman

% error

ICC

Correlation

Bias

LOA

Mean

Mean

95% CI

R

GLS

−0.3

3.6 to − 3.7

1.4

0.82

0.61–0.87

0.73*

Basal ante septum

−6.5

8.7 to − 21.7

30.3

0.43

−0.23 - 0.71

0.32

Basal anterior

−4.5

10.1 to −19

25.4

0.41

−0.26 - 0.62

0.21

Basal lateral

−2.8

8 to − 13.6

14.4

0.49

0.40–0.47

0.51

Basal posterior

−3.1

9.9 to −15.9

13.4

0.48

0.25–0.53

0.34

Basal inferior

3.7

19.7to −12.3

17.2

0.42

0.27–0.61

0.32

Basal septum

−5.7

5.4 to −17.4

34.2

0.49

0.23–0.54

0.29

Mid ante septum

−0.2

13.3 to −12.7

1.3.5

0.74

0.47–0.81

0.51*

Mid anterior

−2.3

9 to −13.5

12.3

0.42

−0.32 - 0.61

0.22

Mid lateral

−1.7

12.2to − 15.7

8.2

0.42

−0.28 - 0.56

0.24

Mid posterior

0.6

13.6 to-12.1

3.1

0.53

0.37–0.65

0.41*

Mid inferior

−1.4

13.5 to-16

1.9

0.37

−0.28 - 0.51

0.30

Mid septum

−1.2

11.5 to-13.9

2.2

0.51

0.39–0.70

0.40

Apical anterior

0.9

11.9 to-10

4.1

0.50

0.34–0.71

0.32

Apical lateral

−1.5

9 to − 12

6.3

0.48

0.36–0.65

0.29

Apical inferior

−1.2

13.6 to −15.6

5.1

0.49

0.30–0.66

0.43*

Apical septum

−1.1

11.1 to −13.1

6.4

0.63

0.42–0.83

0.41*

  1. GLS global longitudinal strain, ante anterior, STE speckle tracking echocardiography, LOA limit of agreement (95% confidence interval, ICC intra-class coefficient, CI confidence interval, R Pearson’s correlation coefficient. % error = 100 X (difference/ mean). * P < 0.05