Vitamin D levels associate with blood glucose and BMI in COVID-19 patients predicting disease severity
Luigi Di Filippo, MD Agnese Allora, MD Mauro Doga, MD Anna Maria Formenti, MD Massimo Locatelli, MD Patrizia Rovere Querini, Professor Stefano Frara, MD Andrea Giustina, Prof Andrea Giustina
doi:10.1210/clinem/dgab599/6349205
Context: High prevalence of Vitamin-D (VD) deficiency in COVID-19 patients was reported and hypothesized to increase COVID-19 severity likely due to its negative impact on immune and inflammatory responses. Furthermore, clear associations between hypovitaminosis-D and fat body-mass excess and diabetes, factors associated with COVID-19 severity, have been widely recognized. Objective: The aim of this study was to evaluate in COVID-19 patients the relationship between VD levels and inflammatory response, BMI, blood glucose and disease severity. Design: Patients admitted to San Raffaele-Hospital for COVID-19 were enrolled in this study, excluding those with comorbidities and therapies influencing VD-metabolism. 25(OH)VD levels, plasma glucose levels, BMI and inflammatory parameters were evaluated at admission.
Results: A total of 88 patients were included. Median VD level was 16.3 ng/mL and VDdeficiency was found in 68.2% of patients. VD-deficiency was found more frequently in male patients and in those affected by severe COVID-19. Regression analyses showed a positive correlation between VD and PaO2/FiO2 ratio, and negative correlations between VD and plasma glucose, BMI, Neutrophil/Lymphocyte ratio, CRP and IL-6.
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'abstract': '<jats:title>Abstract</jats:title>\n'
' <jats:sec>\n'
' <jats:title>Context</jats:title>\n'
' <jats:p>A high prevalence of vitamin D (VD) deficiency in COVID-19 patients '
'has been reported and hypothesized to increase COVID-19 severity likely because of its '
'negative impact on immune and inflammatory responses. Furthermore, clear associations between '
'hypovitaminosis D and fat body mass excess and diabetes, factors associated with COVID-19 '
'severity, have been widely recognized.</jats:p>\n'
' </jats:sec>\n'
' <jats:sec>\n'
' <jats:title>Objective</jats:title>\n'
' <jats:p>The aim of this study was to evaluate in COVID-19 patients the '
'relationship between VD levels and inflammatory response, body mass index (BMI), blood '
'glucose (GLU), and disease severity.</jats:p>\n'
' </jats:sec>\n'
' <jats:sec>\n'
' <jats:title>Methods</jats:title>\n'
' <jats:p>Patients admitted to San Raffaele-Hospital for COVID-19 were '
'enrolled in this study, excluding those with comorbidities and therapies influencing VD '
'metabolism. 25-Hydroxyvitamin D levels, plasma GLU levels, BMI, and inflammatory parameters '
'were evaluated at admission.</jats:p>\n'
' </jats:sec>\n'
' <jats:sec>\n'
' <jats:title>Results</jats:title>\n'
' <jats:p>A total of 88 patients were included. Median VD level was 16.3 '
'ng/mL and VD deficiency was found in 68.2% of patients. VD deficiency was found more '
'frequently in male patients and in those affected by severe COVID-19. Regression analyses '
'showed a positive correlation between VD and PaO2/FiO2 ratio, and negative correlations '
'between VD and plasma GLU, BMI, neutrophil/lymphocyte ratio, C-reactive protein, and '
'interleukin 6. Patients with both hypovitaminosis D and diabetes mellitus, as well those with '
'hypovitaminosis D and overweight, were more frequently affected by a severe disease with '
'worse inflammatory response and respiratory parameters, compared to those without or just one '
'of these conditions.</jats:p>\n'
' </jats:sec>\n'
' <jats:sec>\n'
' <jats:title>Conclusion</jats:title>\n'
' <jats:p>We showed, for the first-time, a strict association of VD levels '
'with blood GLU and BMI in COVID-19 patients. VD deficiency might be a novel common '
'pathophysiological mechanism involved in the detrimental effect of hyperglycemia and '
'adiposity on disease severity.</jats:p>\n'
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