ArticleDiabetology & metabolic syndrome2026
Development and validation of a risk prediction model for dysglycaemia at 6-12 weeks postpartum in Chinese women with gestational diabetes: a retrospective cohort study.
Article in Diabetology & metabolic syndrome, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundCompared with normoglycaemic pregnancies, gestational diabetes mellitus (GDM) confers a markedly elevated risk of dysglycaemia at 6-12 weeks postpartum.
objectiveThis study aimed to develop and externally validate a prediction model for the risk of dysglycaemia at 6-12 weeks postpartum in a Chinese population of women with gestational diabetes mellitus and to provide a clinically usable risk-assessment tool.
methodsThe derivation cohort comprised 500 Chinese women diagnosed with GDM at 24-28 weeks'gestation in the obstetric outpatient clinic of Beijing Friendship Hospital affiliated to Capital Medical University (a single tertiary center in China) between January 2016 and December 2022, who completed a postpartum oral glucose tolerance test. Predictors were selected using LASSO regression, and four machine learning algorithms (logistic regression, decision tree, random forest, and support vector machine) were trained to construct the prediction models, followed by internal validation. For external validation, a prospective cohort of 170 Chinese women with GDM was recruited from Beijing Chaoyang Hospital(another single center in China) from May to November 2023 and followed until 6 weeks postpartum. Finally, an R-Shiny web calculator was developed to facilitate real-time risk estimation.
resultsAmong 500 women in the development cohort, 209 (41.8 %) with GDM developed dysglycaemia at 6-12 weeks postpartum. LASSO regression identified prior GDM, family history of diabetes, HbA1c, 2-hour plasma glucose from the diagnostic 75-g OGTT, and total bilirubin as independent predictors. The four machine-learning models achieved AUCs of 0.606-0.769, accuracies of 0.600-0.729, sensitivities of 0.526-0.877, and specificities of 0.581-0.828; the logistic model was superior. In the external validation cohort of 170 women, 54 (31.8%) developed dysglycaemia. The validated logistic model yielded an AUC of 0.808 (95 % CI 0.740-0.875), sensitivity 0.810, specificity 0.644, and Youden index 0.455, with excellent calibration.
conclusionsThe validated logistic model offers health care personnel a ready-to-use web tool for early postpartum dysglycaemia identification and targeted intervention to curb progression to type 2 diabetes.
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