FIGURE 3. Passing–Bablok graphs of smoothed data’s QGS LVEF vs. tLVEF for smallest (A) and largest (B) volumes. (Same data are present at ends of graph in Fig. 2B.) Slope and y-intercept are calculated with their 95% confidence interval. Confidence intervals are used to determine whether there is only a chance difference between slope and 1 and between y-intercept and 0. Plots show poor agreement when volume is small and good agreement with larger volumes.

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