STR2D: Stata module to compute explained variation for survival models
Abstractstr2d 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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Bibliographic InfoSoftware component provided by Boston College Department of Economics in its series Statistical Software Components with number S457228.
Programming language: Stata
Requires: Stata version 8
Date of creation: 22 Jan 2011
Date of revision:
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
Web page: http://fmwww.bc.edu/EC/
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