Among patients with COVID-19, leptin was significantly higher (p < 0.001) in females (22.9 ng × mL−1; IQR (Q3–Q1) = 29.8) as compared to males (17.5 ng × mL−1; IQR (Q3–Q1) = 29.9) (Figure 1b). Here, LEP is linked to COVID-19.