Additionally, there were no significant differences between the 2 groups in the family history of diabetes mellitus, the prevalence of acanthosis nigricans or purple striae in the skin, systolic blood pressure, diastolic blood pressure, the prevalence of NAFLD, or the levels of alanine transaminase, free fatty acids, total cholesterol, triglycerides, low-density lipoprotein cholesterol or high-density lipoprotein cholesterol (Table 2). Here, GPT is linked to acanthosis nigricans.