As shown in Table 2, in GDM group, univariate correlation analysis after adjustment of maternal age and gestational age showed that circulating CEACAM1 levels were positively correlated with ISOGTT (R = 0.39, P = 0.001), while negatively correlated with 1hPINS (R = -0.32, P = 0.008), 2hPINS (R = -0.33, P = 0.006), AUCI (R = -0.36, P = 0.002), no significant correlations were observed between CEACAM1 and the other parameters (p > 0.05). This evidence concerns the gene CEACAM1 and gestational diabetes.