Meanwhile, age, diabetes duration, and CRP showed a weaker association with DPN status (OR = 1.024, 95% CI: 1.003–1.046; OR = 1.008, 95% CI: 1.006–1.011; OR = 1.017, 95% CI: 1.003–1.031; P < 0.05 for all) (Supplementary Table S4 and S5). The gene discussed is CRP; the disease is diabetes mellitus.