After adjusting for age, sex, BMI, hypertension, diabetes, drinking habits, smoking habits, cardiocerebrovascular diseases, and cancer, multiple linear regression analysis showed that there is a statistically significant correlation between being a female and ACE2 expression (β = 0.550, p < 0.001), between older age and ACE2 expression (β = 0.197, p = 0.003), between smoking and ACE2 expression (β = 0.163, p = 0.037), and between cancer and ACE2 expression (β = 0.265, p < 0.001). Here, ACE2 is linked to diabetes mellitus.