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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