CRP and COVID-19: Among COVID-19 patients with comorbid conditions, there was no significant correlation with the NLR and urea, but significant p-values of 0.019, 0.027, 0.00, 0.00, 0.043, 0.001, and 0.000 were obtained for sodium, potassium, CRP, ferritin, creatinine, total protein, and albumin, respectively, among which CRP and ferritin showed the highest significance (Table 1).