Figure 2

Box-plot of serum C-reactive protein levels on admission in patients who required mechanical ventilation compared to those who did not. The dotted boxes represent the interquartile range (25th to 75th percentiles), the thick black line in the box is the 50th percentile (median), and the bars represent the range of results, excluding outliers. The black dots are "outliers" and the black star is an "extreme outlier".