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The impact of self-report inaccuracy in the UK Biobank and its interplay with selective participation

Author

Listed:
  • Tabea Schoeler

    (University of Lausanne
    University College London
    Swiss Institute of Bioinformatics)

  • Jean-Baptiste Pingault

    (University College London
    King’s College London)

  • Zoltán Kutalik

    (University of Lausanne
    Swiss Institute of Bioinformatics
    University Center for Primary Care and Public Health)

Abstract

Although the use of short self-report measures is common practice in biobank initiatives, such a phenotyping strategy is inherently prone to reporting errors. To explore challenges related to self-report errors, we first derived a reporting error score in the UK Biobank (UKBB; n = 73,127), capturing inconsistent self-reporting in time-invariant phenotypes across multiple measurement occasions. We then performed genome-wide scans on the reporting error score, applied downstream analyses (linkage disequilibrium score regression and Mendelian randomization) and compared its properties to the UKBB participation propensity. Finally, we improved phenotype resolution for 24 measures and inspected the changes in genomic findings. We found that reporting error was present across all 33 assessed self-report measures, with repeatability levels as low as 47% (childhood body size). Reporting error was not independent from UKBB participation, evidenced by the negative genetic correlation between the two outcomes (rg = −0.77), their shared causes (for example, education) and the loss in self-report accuracy following participation bias correction. Across all analyses, the impact of reporting error ranged from reduced power (for example, for gene discovery) to biased estimates (for example, if present in the exposure variable) and attenuation of genome-wide quantities (for example, 21% relative attenuation in SNP heritability for childhood height). Our findings highlight that both self-report accuracy and selective participation are competing biases and sources of poor reproducibility for biobank-scale research.

Suggested Citation

  • Tabea Schoeler & Jean-Baptiste Pingault & Zoltán Kutalik, 2025. "The impact of self-report inaccuracy in the UK Biobank and its interplay with selective participation," Nature Human Behaviour, Nature, vol. 9(3), pages 584-594, March.
  • Handle: RePEc:nat:nathum:v:9:y:2025:i:3:d:10.1038_s41562-024-02061-w
    DOI: 10.1038/s41562-024-02061-w
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