Reply to Scarpati, G.; Piazza, O. Comment on "Guerrero-Romero et al. Magnesium-to-Calcium Ratio and Mortality from COVID-19. 2022, , 1686".

We thank Dr. Scarpati and Dr. Piazza for their interest and comments [.

Magnesium-to-Calcium Ratio and Mortality from COVID-19.

Obesity, type 2 diabetes, arterial hypertension, decrease in immune response, cytokine storm, endothelial dysfunction, and arrhythmias, which are frequent in COVID-19 patients, are associated with hypomagnesemia. Given that cellular influx and efflux of magnesium and calcium involve the same transporters, we aimed to evaluate the association of serum magnesium-to-calcium ratio with mortality from severe COVID-19. The clinical and laboratory data of 1064 patients, aged 60.