SARS-CoV-2 positivity rates associated with circulating 25-hydroxyvitamin D levels
SARS-CoV-2 NAAT Positivity Rates and Circulating 25(OH)D Levels by (A) Age Group and (B) Sex. Smooth lines represent the weighted second order polynomial regression fit to the data associating circulating 25(OH)D levels (x) and SARS-CoV-2 positivity rates (y) where: Age <60: y = 0.2161–0.0058*x + 5.6e-05*x2; R2 = 0.94. Age ≥60: y = 0.1515–0.0030*x + 2.4e-05*x2; R2 = 0.91. Female: y = 0.1837–0.0045*x + 3.9e-05*x2; R2 = 0.94. Male: y = 0.2445–0.0068*x + 6.9e-05*x2; R2 = 0.94. SI conversion factor: 1 ng/mL = 0.400641 nmol/L.