The proportion of subclinical hypothyroidism was 7.23% in COVID-19 patients.Patients with NTIS had higher CRP (17.6 (2.6) vs 67.4 (7.4), p<0.001), WBC count (6.26 (0.2) vs 7.59 (0.6), p=0.001) and ESR (43.9 (2.7) vs 81.5 (8.5), p<0.001). Here, CRP is linked to COVID-19.