In Model 1, the risk of postpartum prediabetes was independently predicted by age category ≥ 45 years (OR=5.76, 95% CI = 1.39-23.90) with reference to <35 years old, insulin-requiring GDM (OR=3.37, 95% CI = 1.15-9.91), and OAD-requiring GDM (OR = 6.14, 95% CI = 1.74-21.67); and the model explained 14% of the variance of the dependent variable. The gene discussed is INS; the disease is prediabetes syndrome.