ArticleThe Journal of clinical endocrinology and metabolism2025
Age at Menarche and Coronary Artery Disease Risk: Divergent Associations With Different Sources of Variation.
Article in The Journal of clinical endocrinology and metabolism, 2025. 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
backgroundIn women, both earlier and later age at menarche (AAM) are associated with increased risk of coronary artery disease (CAD). This study examined if the relationship of AAM with CAD and CAD risk factors differs for different underlying sources of variation in AAM-specifically, variation that is attributable to common genetic variants, as represented by a polygenic score (PGS), vs variation in AAM that is independent of the PGS (eg, from environment, rare genetic variants).
methodsPrimary analyses were conducted on data from 201 037 women in the UK Biobank and validation studies on data from 23 268 women in the Women's Genome Health Study. For each individual, a PGS for AAM was calculated; then, 2 variables were estimated from linear regression models: genetically predicted AAM (the estimated AAM for each woman solely due to the effects of common genetic variants) and PGS-adjusted AAM (the estimated AAM for each woman solely due to factors other than the PGS). Logistic and linear regression with linear splines were then used to study the relationships of these variables with CAD and CAD risk factors.
resultsGenetically predicted AAM demonstrated linear or roughly linear relationships with CAD and CAD risk factors. In contrast, PGS-adjusted AAM demonstrated a U-shaped relationship with CAD, hemoglobin A1c, triglycerides, high-density lipoprotein cholesterol, and waist-hip ratio.
conclusionThese results are consistent with earlier AAM causally increasing risk of CAD but suggest that later AAM itself does not cause increased risk of CAD; rather, sources of variation in AAM other than common genetic variants can cause both later AAM and increased risk of CAD. Dysglycemia, dyslipidemia, and central adiposity are candidate mediators of the association of later AAM with increased risk of CAD.
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