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Genetic Risk Score for Intracranial Aneurysms: Prediction of Subarachnoid Hemorrhage and Role in Clinical Heterogeneity

  • CADISP group
  • , International Consortium for Blood Pressure, International Headache Genetics Consortium
  • , International Stroke Genetics Consortium (ISGC) Intracranial Aneurysm Working Group
  • Utrecht University
  • Baker Heart and Diabetes Institute
  • Department of Clinical Pathology
  • University of Oslo
  • Norwegian University of Science and Technology
  • CNRS UMR 6291
  • Department of Neurology
  • The University of Tokyo
  • RIKEN
  • University of Geneva
  • U1167 - RID-AGE - Facteurs de Risque et Déterminants Moléculaires des Maladies Liées au Vieillissement
  • Université de Bordeaux
  • University Hospital of Bordeaux
  • PARCC - Paris-Centre de Recherche Cardiovasculaire
  • University of Michigan, Ann Arbor
  • University of Otago
  • National Institute for Health and Care Research
  • University of Leicester

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Recently, common genetic risk factors for intracranial aneurysm (IA) and aneurysmal subarachnoid hemorrhage (ASAH) were found to explain a large amount of disease heritability and therefore have potential to be used for genetic risk prediction. We constructed a genetic risk score to (1) predict ASAH incidence and IA presence (combined set of unruptured IA and ASAH) and (2) assess its association with patient characteristics. Methods: A genetic risk score incorporating genetic association data for IA and 17 traits related to IA (so-called metaGRS) was created using 1161 IA cases and 407 392 controls from the UK Biobank population study. The metaGRS was validated in combination with risk factors blood pressure, sex, and smoking in 828 IA cases and 68 568 controls from the Nordic HUNT population study. Furthermore, we assessed association between the metaGRS and patient characteristics in a cohort of 5560 IA patients. Results: Per SD increase of metaGRS, the hazard ratio for ASAH incidence was 1.34 (95% CI, 1.20-1.51) and the odds ratio for IA presence 1.09 (95% CI, 1.01-1.18). Upon including the metaGRS on top of clinical risk factors, the concordance index to predict ASAH hazard increased from 0.63 (95% CI, 0.59-0.67) to 0.65 (95% CI, 0.62-0.69), while prediction of IA presence did not improve. The metaGRS was statistically significantly associated with age at ASAH (β=-4.82×10-3per year [95% CI, -6.49×10-3to -3.14×10-3]; P=1.82×10-8), and location of IA at the internal carotid artery (odds ratio=0.92 [95% CI, 0.86-0.98]; P=0.0041). Conclusions: The metaGRS was predictive of ASAH incidence, although with limited added value over clinical risk factors. The metaGRS was not predictive of IA presence. Therefore, we do not recommend using this metaGRS in daily clinical care. Genetic risk does partly explain the clinical heterogeneity of IA warranting prioritization of clinical heterogeneity in future genetic prediction studies of IA and ASAH.

Original languageEnglish
Pages (from-to)810-818
Number of pages9
JournalStroke
Volume54
Issue number3
DOIs
Publication statusPublished - Mar 2023

Keywords

  • Aneurysmal subarachnoid hemorrhage
  • Genetic heterogeneity
  • Genetics
  • Intracranial aneurysm
  • Risk assessment

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