After we performed a risk analysis using a logistic regression model based on these cut-off points for COVID-19 diagnosis only in the patients presenting with the complaint of dyspepsia, we demonstrated that the risk increased 8.546 times (p < 0.001) in the patients with IG values of ≥0.045 × 109 L, 23.611 times (p < 0.001) in the patients with IG% values of ≥0.650, and 18.171 times (p < 0.001) in the patients with CRP values of ≥12.4 mg/L (Table 5). Here, CRP is linked to COVID-19.