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Drug Development.

Tiansheng Wang1, Yongjie Lai2, Elizabeth C Mormino3

  • 1Universtiy of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
PubMed
Summary
This summary is machine-generated.

Statins showed no overall dementia benefit. However, individuals with high Alzheimer's risk (nonAPOE-PRS) and healthy diets may benefit from statins, suggesting personalized dementia prevention strategies.

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Area of Science:

  • Neurology
  • Pharmacology
  • Machine Learning

Background:

  • The effect of statins on dementia risk remains debated, with inconsistent findings possibly due to population heterogeneity.
  • Identifying patient subgroups who benefit from statins is crucial for personalized medicine.

Purpose of the Study:

  • To assess heterogeneous treatment effects (HTEs) of statins on incident dementia using causal machine learning in emulated trials.
  • To identify specific patient characteristics associated with differential statin efficacy.

Main Methods:

  • An emulated target trial was conducted using UK Biobank data (2009-2017) comparing statin initiators and non-initiators (aged 55+).
  • Iterative causal forest (iCF) algorithm applied to propensity score-matched data to identify HTEs.
  • Genetic factors (APOE genotype, nonAPOE-PRS, statin-PRS) and lifestyle were analyzed as potential effect modifiers.

Main Results:

  • Overall, statins showed no significant risk reduction for incident dementia (aRD -0.01%).
  • iCF identified significant HTEs (P=0.001).
  • Patients with high nonAPOE-PRS and healthy dietary habits showed the greatest benefit (aRD -1.18%), while high nonAPOE-PRS alone showed a smaller benefit (aRD -0.47%).

Conclusions:

  • Statins do not offer a general protective effect against dementia in the studied population.
  • A specific subpopulation with high Alzheimer's disease risk (nonAPOE-PRS) and healthy dietary habits may benefit from statin use.