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ROC curve of using FPG in the 19th to 24th gestational weeks to screen GDM in total (A), pre-pregnancy BMI ≥ 24.0 kg/m2 (B), and pre-pregnancy BMI < 24.0 kg/m2 (C) (P < 0.001). BMI: Body mass index; FPG: Fasting plasma glucose; GDM: Gestational diabetes mellitus; ROC: Receiver operating characteristic.
