Characterization of clusters:
In cluster-1 (9 CRS cases) , no significant differences were detectable between the chemokine levels. Regarding the additional parameters, MPO was significantly elevated compared to two or more clusters, IL-22 was significantly higher than in three or more clusters, and IFN-γ (not included in the cluster analysis) was present in cluster-1 (neutrophilic type 1-biased pattern).