Sex (p = 0.019, OR = 1.244), age (p < 0.001, OR = 1.040), dyspnea (p < 0.001, OR = 1.752), cardiovascular diseases (p = 0.009, OR = 1.298), respiratory rate (p < 0.001, OR = 1.028), WBC (p = 0.022, OR = 1.037), HGB (p < 0.001, OR = 0.987), ALB (p = 0.001, OR = 0.966) and CRP (p < 0.001, OR = 1.007) were related to COVID-19 severity in the non-diabetic group. This evidence concerns the gene CRP and COVID-19.