There was no significant difference between the two groups in terms of age, gender, BMI, degree of hearing loss, education level, smoking and drinking habits, laboratory parameters [FBG, ALP, ALT, AST, TC, TG, HDL-C, LDL-C], comorbidities (hypertension, hyperlipidemia, and diabetes mellitus), and family history of hearing loss (all p > 0.05), as shown in Table 1. This evidence concerns the gene GPT and diabetes mellitus.