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. 2023 May 18;12(5):735. doi: 10.3390/biology12050735

Table 1.

Low Versus Normal Serum Magnesium in COVID-19 Studies.

Mg Status Serum Mg Level COVID-19–Associated Outcomes
mg/dL mmol/L mEq/L
Severe hypomagnesemia <1.58 <0.65 <1.3 Present in 13% of hospitalized patients with COVID-19 [52]
Hypomagnesemia <2.0 <0.82 <1.65 Risk factor for severe COVID-19 [54]
<1.82 <0.75 <1.5 Defines Mg deficiency; increased length of CCU stay [52]
1.80 0.74 1.48 Infection severity and worsened prognosis in ICU patients with COVID-19 [55]
≤1.8 <0.74 <1.48 Death [53]; predicts arterial thromboembolism [56]
High normal 2.19–2.26 0.90–0.93 1.8–1.86 Protective against deterioration [54]

Abbreviations: CCU, critical care unit; ICU, intensive care unit; Mg, magnesium.