What is the prognosis of hypomagnesemia?

Updated: Oct 30, 2020
  • Author: Tibor Fulop, MD, PhD, FACP, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Hypomagnesemia has been linked to poor outcome in several different patient populations. In a study of 21,534 patients on maintenance dialysis, patients with the lowest serum magnesium levels (< 1.30 mEq/L) were at highest risk for death (hazard ratio, 1.63; 95% confidence index, 1.30-1.96). [113]

Hypomagnesemia is a common development in critically ill sepsis patients, and indicates a poor prognosis. Although evidence is derived largely from observational studies, it shows a significant association between hypomagnesemia and with increased need for mechanical ventilation, prolonged intensive care unit stays, and increased mortality in this patient population. [114]

In a Mayo Clinic review of 65,974 hospitalized adult patients, hypomagnesemia on admission was associated with increased in-hospital mortality. Death rates were 2.2% in patients with magnesium levels of 1.5-1.69 mg/dL and 2.4% in those with levels below 1.5 mg/dL; by comparison, mortality in patients with levels of 1.7-1.89 mg/dL were 1.8%. [112]

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