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Explained variation for survival models

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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 LP, 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. 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.
    2. Patrick Royston, 2001. "Flexible alternatives to the Cox model, and more," Stata Journal, StataCorp LP, vol. 1(1), pages 1-28, November.
    3. Patrick Royston & Gareth Ambler, 1999. "Multivariable fractional polynomials," Stata Technical Bulletin, StataCorp LP, vol. 8(43).
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    Cited by:

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    6. 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.
    7. 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.
    8. 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.
    9. 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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