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blandaltman: A command to create variants of Bland–Altman plots

Author

Listed:
  • Mark D. Chatfield

    (The University of Queensland)

  • Tim J. Cole

    (University College London)

  • Henrica C. W. de Vet

    (Amsterdam Medical Center)

  • Louise Marquart-Wilson

    (The University of Queensland)

  • Daniel M. Farewell

    (Cardiff University)

Abstract

Bland–Altman plots can be useful in paired data settings such as measurement-method comparison studies. A Bland–Altman plot has differences, percentage differences, or ratios on the y axis and a mean of the data pairs on the x axis, with 95% limits of agreement indicating the central 95% range of differ- ences, percentage differences, or ratios. This range can vary with the mean. We introduce the community-contributed blandaltman command, which uniquely in Stata can 1) create Bland–Altman plots featuring ratios in addition to differences and percentage differences, 2) allow the limits of agreement for ratios and percent- age differences to vary as a function of the mean, and 3) add confidence intervals, prediction intervals, and tolerance intervals to the plots.

Suggested Citation

  • Mark D. Chatfield & Tim J. Cole & Henrica C. W. de Vet & Louise Marquart-Wilson & Daniel M. Farewell, 2023. "blandaltman: A command to create variants of Bland–Altman plots," Stata Journal, StataCorp LP, vol. 23(3), pages 851-874, September.
    • Handle: RePEc:tsj:stataj:v:23:y:2023:i:3:p:851-874
    DOI: 10.1177/1536867X231196488
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