XRIML: Stata module to calculate reference intervals via maximum likelihood

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XRIML: Stata module to calculate reference intervals via maximum likelihood

Author Info

Eileen Wright () (University of Strathclyde, UK)
Patrick Royston () (MRC Clinical Trials Unit, UK)

Abstract

xriml calculates cross-sectional reference intervals for yvar, which is assumed to follow one of 6 possible distributions. The parameters are estimated by maximum likelihood. If xvar is specified, reference intervals for yvar conditional on xvar are estimated. Typically, xvar is age. The parameters of the distribution are modelled as functions of xvar using fractional polynomials (see fracpoly). xripred calculates the survival, density and hazard functions according to the most recently-fitted xriml model. This is an update of a program published in STB-40. This is version 4.0.1 of the software, requiring Stata 8.0.

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File URL: http://fmwww.bc.edu/repec/bocode/x/xriml.ado
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File URL: http://fmwww.bc.edu/repec/bocode/x/xripred.ado
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File URL: http://fmwww.bc.edu/repec/bocode/c/centcalc.ado
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S414101.

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Programming language: Stata
Requires: Stata version 8.0
Date of creation: 24 Jul 2000
Date of revision: 22 Feb 2008
Handle: RePEc:boc:bocode:s414101

Note: This module may be installed from within Stata by typing "ssc install xriml". Windows users should not attempt to download these files with a web browser.
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Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
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This page was last updated on 2008-7-24.

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