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Causal mediation analysis with a three-dimensional image mediator.

Minghao Chen1, Yingchun Zhou1,2

  • 1Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE, School of Statistics, East China Normal University, Shanghai, People's Republic of China.

Statistics in Medicine
|May 11, 2024
PubMed
Summary
This summary is machine-generated.

A new causal mediation analysis method handles high-dimensional image mediators. It found cesarean delivery may negatively impact child IQ, mediated by white matter development.

Keywords:
causal inferencemediation analysisstructural equation modelthree‐dimensional image data

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Area of Science:

  • Neuroscience
  • Biostatistics
  • Developmental Psychology

Background:

  • Causal mediation analysis is vital across scientific disciplines.
  • The prevalence of high-dimensional mediators, especially in big data studies, presents challenges.
  • Neuroimaging, particularly magnetic resonance imaging, offers opportunities for image-based mediation analysis.

Purpose of the Study:

  • To propose a novel causal mediation analysis method for three-dimensional image mediators.
  • To define average causal effects and establish conditions for valid identification.
  • To develop robust estimation and inference techniques for this new method.

Main Methods:

  • Developed a novel causal mediation analysis framework for 3D image mediators.
  • Defined average causal effects within the potential outcome framework.
  • Explored conditions for valid identification and created estimation/inference techniques.

Main Results:

  • Simulations confirmed the method's effectiveness across various scenarios.
  • Applied the method to analyze the effect of delivery mode on child IQ.
  • Identified white matter development as a mediator linking cesarean section to intellectual performance.

Conclusions:

  • The proposed method offers a new approach for causal mediation analysis with image data.
  • Cesarean delivery may be associated with reduced intellectual performance in children.
  • White matter development is a potential mediating pathway for this effect, warranting further investigation.