Fig. 4.

Enumeration profile and feature importance of the ten top clusters out of a total of 306 for the classifier built on the ND (N = 19) and Post-COVID (N = 100) cohorts. (A) Box plot showing the cellular and acellular cluster enumeration profile of the ND and Post-COVID cohorts. The median value is depicted by the midline of the boxplot, the third and first quartiles are the upper and lower bounds of the box, and the whiskers cover 1.5 times the IQR. (B) Feature importance of top ten clusters quantified by the mean decrease in impurity obtained from the Random Forest component of the classifier model.