Fig. 4From: COVID-19-related acute invasive fungal rhinosinusitis: risk factors associated with mortalityCox proportional hazard survival curves for patients with serum ferritin > 165 ng/ml or ≤ 165 μg/l. Serum ferritin > 165 ng/ml is an independent predictor of mortality (Cox proportional hazard = 12.561, 95% CI = 3.059 to 51.570, P value = 0.0004)Back to article page