Figure 1.

Box-and-whisker plots of the RBC intraoperative usage by opening surgeons (A, B) and anesthesiologists (C, D). The surgeons and anesthesiologists were independent of each other and not paired teams. The median (horizontal line within each box), the 25th percentile (lower edge of the box), and the 75th percentile (upper edge of the box) are displayed. The whiskers (vertical lines) indicate the minimum and maximum values within the data set. The length of the box represents the interquartile range (IQR). The dots indicate the outliers. Some of the outliers are not shown.