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Related Concept Videos

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
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Related Experiment Video

Updated: May 15, 2025

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Bone mineral density and cardiovascular diseases: a two-sample Mendelian randomization study.

Ahmed M Salih1,2,3,4, Dorina-Gabriela Condurache1,4, Stefania D'Angelo5

  • 1William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, London EC1M 6BQ, United Kingdom.

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|April 7, 2025
PubMed
Summary

This study found no causal link between bone density and major cardiovascular diseases. These findings suggest shared risk factors, not direct causation, explain previous associations between bone and heart health.

Keywords:
BMDMendelian randomizationcardiovascular diseasescausalitygenome-wide association studyosteoporosis

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Area of Science:

  • Genetics
  • Cardiovascular Medicine
  • Bone Metabolism

Background:

  • Observational studies show inconsistent links between bone mineral density (BMD) and cardiovascular disease (CVD).
  • The causality of the relationship between BMD and CVD remains debated.
  • Robust methodologies are needed to clarify this association.

Purpose of the Study:

  • To evaluate the causal relationship between genetically predicted BMD and seven major CVDs.
  • To investigate potential shared genetic factors influencing bone mineral density and cardiovascular health.
  • To differentiate direct causal effects from confounding factors in the BMD-CVD association.

Main Methods:

  • Two-sample Mendelian randomization (MR) using publicly available genome-wide association studies (GWAS) data.
  • Utilized UK Biobank (primary) and FinnGen (validation) cohorts for cardiovascular outcomes.
  • Employed inverse variance weighted (IVW), weighted median, weighted mode, and MR-Egger regression models, with MR-Egger Pleiotropy RESidual Sum and Outlier test for pleiotropy assessment.

Main Results:

  • No statistically significant causal relationship was found between genetically predicted BMD and atrial fibrillation, angina, ischemic heart disease, heart failure, hypertension, myocardial infarction, or non-ischemic cardiomyopathy.
  • Results were consistent across multiple MR analytical methods (IVW, weighted median, weighted mode, MR-Egger).
  • Validation analysis using the FinnGen cohort confirmed the primary findings, showing no causal link.

Conclusions:

  • This comprehensive MR study provides no evidence for a causal effect of BMD on major CVDs.
  • Observed associations in prior studies are likely due to shared underlying risk factors.
  • The findings suggest that bone density does not directly cause cardiovascular disease.