Fig. 1

Baseline laboratory parameters define different patterns of response to Sars-CoV-2 infection. a Clustering analysis by a principal component analysis (PCA) scatter plot. Colours and shapes respectively represent the 3 risk groups and the status of the patient (recovered or dead). b distribution of patients according to risk group and age or sex. c ANOVA and T-test results of the 6 parameters which mainly influenced patients’ clustering, according to their distribution across risk groups. Within each sub-panel, p values for ANOVA comparison (bottom) and for each pairwise comparison (top) are reported. d Patient distribution according to risk groups and dead/recovered status; on the right side, the histogram shows the comparison of iron to ferritin ratio (IFR) between recovered and dead patients within the intermediate-risk group