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Table 7 Intra-class correlation coefficient (ICC) analysis of intra- and inter-observer variations for strains, twist and torsion of the left ventricle from 3D STE

From: The impact of preload on 3-dimensional deformation parameters: principal strain, twist and torsion

 

Intra-observer variation

Inter-observer variation

 

ICC

95% CI

ICC

95% CI

Pre-HD

 GPS

0.884

0.707–0.954

0.754

0.415–0.899

 GLS

0.957

0.891–0.983

0.821

0.547–0.929

 GCS

0.815

0.533–0.927

0.628

0.060–0.853

 GRS

0.910

0.773–0.964

0.771

0.422–0.910

 Twist

0.825

0.557–0.931

0.936

0.838–0.975

 Torsion

0.868

0.666–0.948

0.949

0.870–0.980

Post-HD

 GPS

0.898

0.743–0.960

0.619

0.037–0.849

 GLS

0.880

0.697–0.952

0.709

0.265–0.885

 GCS

0.855

0.633–0.943

0.717

0.285–0.888

 GRS

0.923

0.807–0.970

0.814

0.529–0.926

 Twist

0.772

0.424–0.910

0.775

0.431–0.911

 Torsion

0.713

0.276–0.887

0.746

0.358–0.899

  1. CI confidence interval, 3D three-dimensional, STE speckle tracking echocardiography, HD hemodialysis, GPS global principal strain, GLS global longitudinal strain, GCS global circumferential strain, GRS global radial strain