ArticleInternational journal of endocrinology2026
Genetic Evidence Links Gestational Diabetes Mellitus to Increased ER-Negative Breast Cancer Risk Through a Mendelian Randomization Analysis.
Article in International journal of endocrinology, 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
Observational studies reached conflicting results regarding the association between gestational diabetes mellitus (GDM) and breast cancer (BC), leaving the causal nature of this relationship unresolved. To clarify this, a Mendelian randomization (MR) study was performed. In brief, genetic instruments for GDM were obtained from the FinnGen project, and data for BC were obtained from previously published consortia. The primary MR analysis methods included the inverse-variance weighted method, with MR-Egger, weighted median, and weighted mode methods serving as validation. Heterogeneity, pleiotropy, and the influence of outliers were evaluated using mandatory sensitivity analyses. Additional sensitivity analyses included Steiger directionality test, radial MR analysis, and multivariable MR analysis. Genetically predicted GDM demonstrated a significant correlation with an increased risk of overall BC (OR = 1.17, 95% CI: 1.03-1.32,
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