Figure 4: Bland-Altman plots of agreement between measurements of beginner and expert for endocardial global longitudinal strain (EndoGLS): a: RV-EndoGLS; b: LV-EndoGLS. X-axis: Averages of endoGLS values of beginner and expert in %. Y-axis: Differences between the measured values of beginner and expert in percentage points (pp). Dotted line represents 95 % limits of agreement (LoA) and absolute agreement (y=0) of measurements and continuous line represents Bland-Altman bias. Shaded areas represent 95 % confidence interval (CI) limits for bias and LoA. RV = Right ventricle; LV = Left ventricle.
The Bland-Altman-Bias of the ED in both ventricles over all analyzed segments ranged from -0.49 mm ± 1.54 mm to -0.10 mm ± 1.28 mm, that for FS from -0.33 pp ± 11.82 pp to 3.91 pp ± 15.56 pp and that for SI from -0.38 ± 0.68 to -0.15 ± 0.45 (Table 4, Figure S7, S8 and S9 in the supplement).