To further clarify the potential diagnostic value of NDRG1, we collected and conducted a univariate analysis on the general information, main laboratory test results, comorbidities, and NDRG1 expression levels in blood samples from patients with T2DM for more than 10 years but without DKD (T2DM Group) and patients with DKD and DR (DKD Group) (Table 1). The gene discussed is NDRG1; the disease is type 2 diabetes mellitus.