I suspect that what you need will be in "S-PLUS (and R) Manual to
Accompany Agresti’s Categorical Data Analysis (2002)" 2nd edition by
Laura A. Thompson, 2007 which I have always been able to find with a
Google search. Yep, it's still there:
https://home.comcast.net/~lthompson221/Splusdiscrete2.pdf
Its Chapter 7, "Logit Models for Multinomial Responses " discusses
various cumulative logit models.
The polr function (proportional odds logistic regression) in MASS will
return the regression equivalent of what you are asking for. Thompson
says the lrm in the "Desing library" will also do it, by which she
really means that the lrm in the Design package by Harrell will do it.
The link she offers is outdated and it doesn't really matter for
obtaining the Hmisc/Design packages, since they are on CRAN, but
online available documentation is currently at:
http://biostat.mc.vanderbilt.edu/twiki/bin/view/Main/StatComp
She then also mentions "lcr (library ordinal), and nordr (library
gnlm)". Later in the chapter she illustrates the use of the vglm
function in in the vgam package.
--
David Winsemius
On Feb 27, 2009, at 9:04 AM, Jourdan Gold wrote:
Hello,
I am searching for an R-Package that does an exentsion of the Mantel-
Haenszel test for ordinal data as described in Liu and Agresti
(1996) "A Mantel-Haenszel type inference for cummulative odds
ratios". in Biometrics. I see packages such as Epi that perform it
for binary data and derives a varaince for it using the Robbins and
Breslow variance method. As well as another pacakge that derives it
for nominal variables but does not provide a variance or confidence
limit.
Does a package exist that does this? I have searched the list
archives and can't seem to see such a package but I could be missing
something. thank you.
yours sincerely,
Jourdan
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