Fig. 2. Box plot of the duration of postdural puncture headaches (PDPH) and the pain intensity-duration (verbal rating score for pain (VRSP) × days) curve area (AUC) for the subjects that received a prophylactic epidural blood patch (PEBP) or sham injection. The box solid line represents the median value, the boxes are the interquartile range, and the whiskers are the 10th and 90th percentile range.