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Physiological, biological and radiological severity markers in hypocalcaemic (corrected calcium <2.2 mmol/L) and normocalcaemic (≥2.2 mmol/L) patients with COVID-19. (A) Respiratory rate. (B) Oxygen saturation-to-fraction of inspired oxygen (S:F) ratio. (C) White cell count. (D) C-reactive protein (CRP). (E) Lymphocyte count. (F) Number of abnormal chest X-ray (CXR) zones. Plots show median and IQR. *P<0.05; **p<0.01; ***p<0.001. ns, not significant.
