CRP and COVID-19: C-reactive protein (CRP) (MD = 16.58 mg/L, 95 % CI -22.67–55.82 mg/L), hemoglobin (mean difference=-2.38 g/L, 95 % CI -7.13–2.37 g/L), and fibrinogen (MD = 0.23 g/L, 95 % CI -0.23–0.69 g/L) did not show significant difference between thrombotic and non-thrombotic patients with COVID-19 (Fig. 3 m-o).