Figure 1

Boxplots of the observed (black) and predicted (red) MAP values before (1) and after (2) the bupivacaine anaesthetic blockade in the normotensive (left) and hypertensive (right) groups. The predicted values were determined using the fitted models. The bold horizontal line represents the median while the bottom and top of the box correspond to the 25^th and 75^th percentiles, respectively; the height of the box is denoted by interquartile range (IQR); the end of the whiskers represent the lowest datum still within 1.5 IQR of the lower quartile, and the highest datum still within 1.5 IQR of the upper quartile. MAP, mean arterial pressure.