Vitamin D deficiency as a predictor of poor prognosis in patients with acute respiratory failure due to COVID-19.

J Endocrinol Invest · 2021 · PMC7415009 · PMID 32772324

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did not reach statistical significanceno p-value reported

Mean age was higher (74 ± 11 years) in group 4 but this difference did not reach statistical significance.

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