Vit D deficiency increased likelihood of being COVID-19 positive by 4.6 times.
Increased risk for Covid-19 in patients with Vitamin D deficiency.
Katz, J., Yue, S., & Xue, W. (2020). Increased risk for COVID-19 in patients with vitamin D deficiency. Nutrition (Burbank, Los Angeles County, Calif.), 84, 111106. Advance online publication. https://doi.org/10.1016/j.nut.2020.111106
This is a retrospective database analysis showing patients with vitamin D deficiency were 4.6 times more likely to be positive for COVID-19 (indicated by the ICD-10 diagnostic code COVID19) than patients with no deficiency. The association decreased slightly after adjusting for sex and malabsorption. The association decreased significantly but remained robust after adjusting for race, periodontal disease.