Document Type : Original Research


1 Department of Internal Medicine, Clinical Research Development Unit, Hajar Hospital, Shahrekord University of Medical Sciences, Shahrekord, Iran

2 Department of Parasitology, School of Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran

3 Evidence Based Medicine Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

4 Division of Preventive Cardiology, Department of Cardiovascular Medicine, Mayo Clinic, USA.

5 Department of Infectious Disease, Clinical Research Development Unit, Hajar Hospital, Shahrekord University of Medical Sciences, Shahrekord, Iran

6 Department of Epidemiology and Biostatistics, School of Health, Modeling in Health Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran

7 Clinical and Anatomical Pathologist, Clinical Research Development Unit, Shahrekord University of Medical Sciences, Shahrekord, Iran



Background & Objective: 
Previous studies have addressed the electrolyte abnormalitiessuch as hypocalcemiain COVID-19 patients. We aimed to compare the laboratory findings especially the electrolyte levels amongCOVID-19 patients and healthy controls and evaluate their prognostic values.
Materials and Methods: This case-control study included 91 COVID-19 patients and 169 healthy individuals. Their laboratory parameters including electrolytes, albumin, liver enzymes, complete blood count, vitamin D, and parathyroid hormone (PTH) were compared. We also analyzed the association between these markers and the major outcomes including severity, mortality and hospitalization.
Results: Among patients with COVID-19, 59.3% of the patients had hypocalcemia on admission while in control group only 32.5% had low calcium level (OR=3.02, 95% CI: 1.79-5.13, p <0.001). The rates of death and ICU admission were significantly higher among the patients in hypocalcemic group than those of eucalcemic group (85.7% vs 14.3% and 33.3% Vs 9.1%, respectively). However, there was no significant difference in the mean PTH and vitamin D levels between the two groups. In terms of the severity of the infection, 74.1% of patients in hypocalcemic group had a severe infection while 24.3% of the patients in eucalcemic group were diagnosed with severe infection (OR=8.89, 95% CI: 3.38-23.37, p <0.001).
Conclusion: Patients with COVID-19 had considerable laboratory abnormalities including hypocalcemia. The hypocalcemia was also associated with worse major clinical outcomes and higher mortality risk.


Main Subjects

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