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Re: st: RE: rank-sum test for clustered data

From   Berthold Hoppe <>
Subject   Re: st: RE: rank-sum test for clustered data
Date   Fri, 18 Jul 2008 18:33:20 +0200

Dear Roger, dear David,

many thanks,

Am 18 Jul 2008 um 18:03 schrieb Newson, Roger B:

The somersd package, downloadable from SSC using the ssc command, can do
rank analyses on clustered data. The parameters estimated can be Somers'
D (the parameter behind the ranksum test), Kendall's tau-a, or median
differences, slopes and ratios. And the package is distributed with a
set of .pdf manuals.

In Stata, to see a description of the -somersd- package, type

ssc describe somersd

And, to install it, type

ssc install somersd, replace

And, to copy the manuals to your local folder, type

net get somersd.pdf
net get censlope.pdf
net get cendif.pdf

I hope this helps.


Roger B Newson
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Web page:
Departmental Web page:

Opinions expressed are those of the author, not of the institution.

-----Original Message-----
[] On Behalf Of Berthold
Sent: 18 July 2008 14:31
Cc: Berthold Hoppe
Subject: st: rank-sum test for clustered data

Dear all,

I am interested in performing a non-parametric test like -ranksum-
using clustered data. I have -n- individuals and -a- observations per
Is there an option for ranksum/nptrend/or a comparable analysis, which
is comparable to -logit x y, cluster(n)-.

Many thanks and best regards,
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