Key result
Adverse pregnancy outcome burden linked to ~2.5-fold gradient in 5-year postpartum diabetes risk.
Why the study?
Individual adverse pregnancy outcomes confer increased postpartum cardiometabolic risk after gestational diabetes mellitus, but the prognostic implications of co-occurring patterns remained unclear.
Does integrating latent class-derived adverse pregnancy outcome phenotypes with cumulative burden stratify early postpartum cardiometabolic risk in women with gestational diabetes mellitus?
Cohort (n=82,366)
Yes
Does integrating latent class-derived adverse pregnancy outcome phenotypes with cumulative burden stratify early postpartum cardiometabolic risk in women with gestational diabetes mellitus?
Integrating specific adverse pregnancy outcome phenotypes (preterm birth and fetal growth status) with cumulative APO counts using routinely available delivery data effectively stratifies early postpartum diabetes and cardiometabolic risk in women with gestational diabetes.
Background Individual adverse pregnancy outcomes (APOs) confer increased postpartum cardiometabolic risk after gestational diabetes mellitus (GDM), yet the prognostic implications of co-occurring patterns remain unclear. We derived clinically interpretable APO phenotypes and integrated them with cumulative burden to stratify postpartum cardiometabolic risk. Methods In a multicenter retrospective cohort of 82,366 women with GDM in Tianjin, China (2008–2023), we used covariate-adjusted Cox models to examine associations of latent class-derived APO classifications, APO counts, and their joint framework with incident postpartum diabetes, cardiometabolic morbidity (incident diabetes, hypertension or dyslipidemia), and stage-4 cardiovascular-kidney-metabolic syndrome. Results Over a median 4.5-year follow-up, individual APOs conferred modest risk (most hazard ratios <2.0), whereas co-occurring combinations showed marked heterogeneity, ranging up to ~10-fold relative to GDM without APOs. Using prespecified (consensus-based) APOs, we identified five latent classes that replicated across GDM criteria and were confirmed externally (Guangzhou cohort). Mutual information and class projection identified preterm birth and fetal growth (small-for-gestational-age [SGA]/appropriate-for-gestational-age [AGA]/large-for-gestational-age [LGA]) as core structural determinants of class separation, motivating a six-category classification (preterm/term × SGA/AGA/LGA). Integrating this phenotype with APO counts into a two-dimensional framework revealed stepwise gradients attributable to cumulative burden and specific profiles, yielding a 2.5-fold gradient in 5-year diabetes risk (2.9%–7.3%) and 2.2-fold gradients for other cardiometabolic outcomes. Findings were consistent in Fine-Gray models. Conclusions APO burden patterns provide a scalable tool to stratify early postpartum cardiometabolic risk after GDM. Using routinely available delivery data, this framework supports standardized triage linking obstetric and cardiometabolic care for prevention.Graphical Abstract_new.jpg
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Fang et al. (2026) conducted a cohort in Gestational diabetes mellitus (GDM) (n=82,366). Adverse pregnancy outcome (APO) burden patterns and phenotypes vs. GDM without adverse pregnancy outcomes was evaluated on Incident postpartum diabetes, cardiometabolic morbidity (incident diabetes, hypertension or dyslipidemia), and stage-4 cardiovascular-kidney-metabolic syndrome. Integrating adverse pregnancy outcome phenotypes with cumulative burden yielded a 2.5-fold gradient in 5-year postpartum diabetes risk (2.9% to 7.3%) after gestational diabetes.
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