Fig. 2

Relationship between a number of didactic hours, b number of hands-on practice hours, and c number of scans performed during a standardized training phase on learner agreement with expert echocardiographers for the detection of left ventricular systolic dysfunction (left panel, navy) and pericardial effusions (right panel, light blue). The Pearson correlation coefficient (r) and p value for the linear fit are reported for each data set, and regression lines are shown with 95% confidence intervals (dashed lines). Agreement is expressed by the kappa coefficient, κ