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Table 4 Intra- and inter-observer variability of different strain parameters

From: Cardiovascular magnetic resonance myocardial feature tracking detects quantitative wall motion during dobutamine stress

Parameter Ventricle Variability Mean CI (95%) p-value
Ecc SAX LV Intra-observer 24.1 22.3-25.8 0.06
    22.7 20.8-24.6  
   Inter-observer 24.1 22.3-25.8 0.61
    24.6 22.6-26.6  
Err SAX LV Intra-observer 19.6 15.8-23.4 0.86
    19.9 16.5-23.2  
   Inter-observer 19.6 15.8-23.4 0.06
    25.4 22.3-28.4  
Err LAX LV Intra-observer 15.3 12.7-18 1
    15.3 13-17.7  
   Inter-observer 15.3 12.7-18 0.32
    16.6 14.4-18.7  
Ell LV LV Intra-observer 15.9 13.2-18.6 0.57
    15.2 12.4-18.1  
   Inter-observer 15.9 13.2-18.6 0.82
    16.2 13.2-19.1  
Ell RV RV Intra-observer 19.6 16-23.3 0.13
    16.8 13.4-20.1  
   Inter-observer 19.6 16-23.3 0.32
    21.4 17.8-25  
  1. The table shows intra- and inter-observer variability of different strain parameters. 95% Confidence Intervalls of the difference and p-values are given to accurately determine individual variabilities [12]. Ecc SAX = left ventricular short-axis circumferential strain, Err SAX = left ventricular short-axis radial strain, Err LAX = left ventricular long-axis radial strain, Ell LV = left ventricular longitudinal strain, Ell RV = right ventricular longitudinal strain, LV = left ventricle, RV = right ventricle.