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Vitamin D Insufficiency as a Potential Culprit in Critical COVID-19 Patients

Thursday, August 6, 2020 Coronavirus News
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Background

As an immune modulator vitamin D has been implicated in the Coronavirus disease‐2019 (COVID‐19) outcome. We aim to systematically explore the association of vitamin D serum levels with COVID‐19 severity and prognosis.
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Methods

The standardized mean difference (SMD) or odds ratio and 95% confidence interval (CI) were applied to estimate pooled results from seven studies. The prognostic performance of vitamin D serum levels for predicting adverse outcomes with detection of the best cutoff threshold was determined by ROC curve analysis. Decision tree analysis by combining vitamin D levels and clinical features was applied to predict severity in COVID‐19 patients.
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Results

Mean vitamin D serum level of 1368 patients was 22.9 nmol/L (21.9‐23.8). Significant heterogeneity was found (I2 = 99.9% P< 0.001). Patients with poor prognosis (N=634) had significantly lower serum levels of vitamin D compared to those with good prognosis (N=669) representing an adjusted standardized mean difference of ‐5.12 (95% Cl= ‐9.14 to ‐1.10 P = 0.012).

Conclusion

Serum vitamin D levels could be implicated in the COVID‐19 prognosis. Diagnosis of vitamin D deficiency could be a helpful adjunct in assessing patients potential of developing severe COVID‐19. Appropriate preventative and/or therapeutic intervention may improve COVID‐19 outcomes.
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