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Updated: Jan 14, 2026

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The Effect of Alcohol Intake on Brain White Matter Microstructural Integrity: A New Causal Inference Framework for

Chixiang Chen1, Shuo Chen1, Zhenyao Ye1

  • 1Division of Biostatistics and Bioinformatics, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD.

Journal of the American Statistical Association
|October 22, 2025
PubMed
Summary

Daily alcohol consumption may harm brain white matter integrity in the fornix, a key area for aging-related changes. This study used advanced methods to analyze UK Biobank data, revealing potential links between alcohol intake and reduced brain structure.

Keywords:
Brain agingData integrationEnsemble learningPhenomicsRobustness

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Biostatistics

Background:

  • Alcohol consumption is linked to cognitive decline, but its precise effects on the central nervous system are unclear.
  • The fornix is a critical brain region for detecting age-related white matter degeneration.

Purpose of the Study:

  • To investigate how alcohol intake frequency affects white matter integrity in the fornix.
  • To address challenges of nonlinear confounding and incomplete data in phenomic analysis.

Main Methods:

  • Developed a novel ensemble learning framework for robust causal inference.
  • Integrated data from UK Biobank participants with incomplete phenomic data.
  • Utilized neuroimaging to measure fractional anisotropy in the fornix.

Main Results:

  • Daily alcohol intake was associated with reduced fractional anisotropy in the fornix.
  • Daily alcohol intake correlated with increased systolic and diastolic blood pressure.
  • The proposed method demonstrated superior performance in reducing estimation bias compared to alternatives.

Conclusions:

  • Daily alcohol consumption may negatively impact white matter integrity in the fornix.
  • The developed causal inference framework effectively handles complex phenomic data.
  • Findings highlight the importance of considering alcohol intake in studies of brain aging.