PlaqueHDAC9expression (inverse-rank transformed) in study participants across vulnerable plaque index scores (pvalue derived from Kruskal-Wallis test). Shown are the median values (central line), the upper and lower quartiles (box limits) and the 1.5× interquartile range (whiskers). 12 outlier observations withHDAC9expression levels > 100 are not displayed for graphical reasons. Statistics reported with raw data; associations without outliers show apvalue = 0.023.