Abstract Body

Background and Purpose: Although there are different results in the literature, some studies indicated that low vitamin D levels may be related to increased risk of COVID-19 and related mortality. In this study we aimed to evaluate whether there is such a relation in the urban population of Bursa, which was previously analyzed for the status of vitamin D and found to have relatively low vitamin D levels.

Methods: The data of patients with PCR positivity (n=212) for SARS-CoV-2 infection between 1 March 2020 and 15 December 2020 in the patient population registered to family physicians in 30 different Family Health Centers in Bursa were retrospectively evaluated. Their vitamin D levels were obtained from the previous records and compared with those without PCR positivity (n= 1893) retrospectively. The vitamin D levels of PCR positive patients who survived (n=206) or died due to COVID-19 (n=4) were also compared. Descriptive statistics were given as median (min-max) for continuous variables.

Results: The mean age of 1893 subjects without SARS-CoV-2 infection was 43,47 years, 726 (38,4%) were males and 1167 (61,6%) were females. There was no significant difference in vitamin D levels among 2105 subjects with PCR positivity for SARS-CoV-2 infection and the negative population [16.77 ng/mL (3-50.99) vs 16.27 ng/mL (3-140), respectively, p=0,380] as well as vitamin D levels of those died due to COVID-19 infection or survived [14 ng/mL (10.33-22.76) vs 16.97 ng/mL (3-50.99), respectively, p=0,361]

Conclusions: In this retrospective study, we could not demonstrate any relation between low vitamin D levels and COVID-19 infection and related death in our population.