Pervasive biases in proxy genome-wide association studies based on parental history of Alzheimer’s disease

Summary

This 2024 Nature Genetics paper by Wu and colleagues examines fundamental methodological limitations in proxy genome-wide association studies that rely on parental history of Alzheimer's disease. The authors demonstrate that pervasive biases are inherent to this study design, which has implications for the reliability of genetic findings in neurodegenerative disease research. The work contributes to critical appraisal of GWAS methodology and highlights the need for caution when interpreting results from proxy-based genetic studies.

Regional applicability

This methodological critique is relevant to United Kingdom biomedical research, particularly within the UK Biobank and similar population cohort studies that use parental disease history as a proxy phenotype. The findings would apply directly to UK-based genetic epidemiology studies and suggest need for methodological review of existing proxy-GWAS analyses conducted in British research institutions.

Key measures

Bias patterns in pGWAS using parental Alzheimer's disease history; genetic association validity; proxy phenotype validity metrics

Outcomes reported

The study examined pervasive biases in proxy genome-wide association studies (pGWAS) that use parental history of Alzheimer's disease as a proxy phenotype. The research identified and characterised systematic biases that affect the validity and interpretability of genetic associations derived from such proxy-based approaches.

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