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STR2D: Stata module to compute explained variation for survival models

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Author Info

  • Patrick Royston

    ()
    (MRC Clinical Trials Unit)

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    Abstract

    str2d computes Royston & Sauerbrei (2004)'s R≤ statistic based on their index of discrimination (D) for proportional hazards, proportional odds and probit models for censored survival data. The D measure is available for all survival_cmds except streg, distribution(gamma). str2ph computes Royston (2006)'s modification of O'Quigley, Xu & Stare's (2005) modification of Nagelkerke's (1991) R-squared (R≤) statistic (a.k.a. coefficient of determination, proportion of explained variation) for proportional hazards (PH) models for censored survival data. str2ph will also give sensible results in non-PH survival models supported by streg and stpm; see Royston (2006) for further information.

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    File URL: http://fmwww.bc.edu/repec/bocode/s/str2d.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/s/str2d.hlp
    File Function: help file
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    File URL: http://fmwww.bc.edu/repec/bocode/s/str2ph.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/s/str2ph.hlp
    File Function: help file
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    Bibliographic Info

    Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S457228.

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    Programming language: Stata
    Requires: Stata version 8
    Date of creation: 22 Jan 2011
    Date of revision:
    Handle: RePEc:boc:bocode:s457228

    Note: This module should be installed from within Stata by typing "ssc install str2d". Windows users should not attempt to download these files with a web browser.
    Contact details of provider:
    Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
    Phone: 617-552-3670
    Fax: +1-617-552-2308
    Email:
    Web page: http://fmwww.bc.edu/EC/
    More information through EDIRC

    Order Information:
    Web: http://repec.org/docs/ssc.php

    Related research

    Keywords: survival; explained variation; index of discrimination;

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