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Explained variation for survival models

Author

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  • Patrick Royston

    (Cancer Group, MRC Clinical Trials Unit)

Abstract

This article introduces a new measure of explained variation for use with censored survival data. It is a modified version of a measure previously described by John O'Quigley and colleagues, itself a modification of Nagelkerke’s earlier proposal for a general index of determination. I describe Stata programs str2ph, which implements the new measure, and str2d, which implements a measure proposed in 2004 by Royston and Sauerbrei. I provide examples with real data. Copyright 2006 by StataCorp LP.

Suggested Citation

  • Patrick Royston, 2006. "Explained variation for survival models," Stata Journal, StataCorp LLC, vol. 6(1), pages 83-96, March.
  • Handle: RePEc:tsj:stataj:v:6:y:2006:i:1:p:83-96
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    References listed on IDEAS

    as
    1. Patrick Royston & Gareth Ambler, 1999. "Multivariable fractional polynomials," Stata Technical Bulletin, StataCorp LLC, vol. 8(43).
    2. Patrick Royston, 2001. "Flexible alternatives to the Cox model, and more," Stata Journal, StataCorp LLC, vol. 1(1), pages 1-28, November.
    3. W. Sauerbrei & P. Royston, 1999. "Building multivariable prognostic and diagnostic models: transformation of the predictors by using fractional polynomials," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 162(1), pages 71-94.
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    Cited by:

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    3. Florence H. Yong & Lu Tian & Sheng Yu & Tianxi Cai & L. J. Wei, 2016. "Optimal stratification in outcome prediction using baseline information," Biometrika, Biometrika Trust, vol. 103(4), pages 817-828.
    4. Leive, Adam, 2018. "Dying to win? Olympic Gold medals and longevity," Journal of Health Economics, Elsevier, vol. 61(C), pages 193-204.
    5. Jane Lyons & Vahé Nafilyan & Ashley Akbari & Stuart Bedston & Ewen Harrison & Andrew Hayward & Julia Hippisley-Cox & Frank Kee & Kamlesh Khunti & Shamim Rahman & Aziz Sheikh & Fatemeh Torabi & Ronan A, 2023. "An external validation of the QCOVID3 risk prediction algorithm for risk of hospitalisation and death from COVID-19: An observational, prospective cohort study of 1.66m vaccinated adults in Wales, UK," PLOS ONE, Public Library of Science, vol. 18(5), pages 1-17, May.
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    7. Nir Y. Krakauer & Jesse C. Krakauer, 2021. "Association of X-ray Absorptiometry Body Composition Measurements with Basic Anthropometrics and Mortality Hazard," IJERPH, MDPI, vol. 18(15), pages 1-13, July.
    8. Nir Y. Krakauer & Jesse C. Krakauer, 2020. "Association of Body Shape Index (ABSI) with Hand Grip Strength," IJERPH, MDPI, vol. 17(18), pages 1-12, September.
    9. Heli Julkunen & Juho Rousu, 2025. "Comprehensive interaction modeling with machine learning improves prediction of disease risk in the UK Biobank," Nature Communications, Nature, vol. 16(1), pages 1-15, December.
    10. M Fernanda Lima-Costa & James Macinko & Juliana Vaz de Melo Mambrini & Cibele C Cesar & Sérgio V Peixoto & Wagner C S Magalhães & Bernardo L Horta & Mauricio Barreto & Erico Castro-Costa & Josélia O A, 2015. "Genomic Ancestry, Self-Rated Health and Its Association with Mortality in an Admixed Population: 10 Year Follow-Up of the Bambui-Epigen (Brazil) Cohort Study of Ageing," PLOS ONE, Public Library of Science, vol. 10(12), pages 1-14, December.
    11. Janez Stare & Maja Pohar Perme & Robin Henderson, 2011. "A Measure of Explained Variation for Event History Data," Biometrics, The International Biometric Society, vol. 67(3), pages 750-759, September.

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