Fig. 2

Correlation of P/F with circulating parameters in COVID-19 patients. Correlation and linear regression analysis of P/F with lymphocyte number, neutrophil number, D-Dimer, ferritin, E2, testosterone, soluble ACE2 and Ang1-7 plasma levels in total (A), female (B) and male (C) patients. The Spearman’s rho (R) and P values were determined using the Spearman’s rank correlation analysis. Solid lines represent best fits as estimated by linear regression analysis. *P < 0.05 was considered statistically significant