Thanks to Kit Baum, a new version of the -somersd- package (described as
below on my website) is now available for download from SSC. In Stata,
use the -ssc- command to do this.
The new version has all the same programs as the previous version, but I
have corrected a few errors in the references in the on-line help file
-cendif.sthlp- and in the .pdf manual -cendif.pdf-. I would like to
thank Garry Anderson for drawing my attention to some of these errors.
Best wishes
Roger
Roger B Newson BSc MSc DPhil
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
UNITED KINGDOM
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Email: [email protected]
Web page: www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/pop
genetics/reph/
Opinions expressed are those of the author, not of the institution.
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package somersd from http://www.imperial.ac.uk/nhli/r.newson/stata10
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TITLE
somersd: Kendall's tau-a, Somers' D and percentile slopes
DESCRIPTION/AUTHOR(S)
The somersd package contains the programs somersd, censlope and
cendif,
which calculate confidence intervals for a range of parameters
behind
rank or "nonparametric" statistics. somersd calculates confidence
intervals for generalized Kendall's tau-a or Somers' D parameters,
and stores the estimates and their covariance matrix as estimation
results.
It can be used on left-censored, right-censored, clustered and/or
stratified data. censlope is an extended version of somersd, which
also
calculates confidence limits for the generalized Theil-Sen median
slopes
(or other percentile slopes) corresponding to the version of
Somers' D
or Kendall's tau-a estimated. cendif is an easy-to-use program to
calculate confidence intervals for Hodges-Lehmann median
differences
(or other percentile differences) between two groups. The somersd
package
can be used to calculate confidence intervals for a wide range of
rank-based parameters, which are special cases of Kendall's tau-a,
Somers' D or percentile slopes. These parameters include
differences
between proportions, Harrell's c index, areas under receiver
operating
characteristic (ROC) curves, differences between Harrell's c
indices or
ROC areas, Gini coefficients, population attributable risks,
median
differences, ratios, slopes and per-unit ratios, and the
parameters
behind the sign test and the Wilcoxon-Mann-Whitney or
Breslow-Gehan
ranksum tests. Full documentation of the programs (including
methods and
formulas) can be found in the manual files somersd.pdf,
censlope.pdf and
cendif.pdf, which can be viewed using the Adobe Acrobat Reader.
Author: Roger Newson
Distribution-date: 24October2008
Stata-version: 10
INSTALLATION FILES (click here to
install)
cendif.ado
censlope.ado
somers_p.ado
somersd.ado
_bcsf_bisect.mata
_bcsf_bracketing.mata
_bcsf_regula.mata
_bcsf_ridders.mata
_blncdtree.mata
_somdtransf.mata
_u2jackpseud.mata
_v2jackpseud.mata
blncdtree.mata
tidot.mata
tidottree.mata
lsomersd.mlib
cendif.sthlp
censlope.sthlp
censlope_iteration.sthlp
mf_bcsf_bracketing.sthlp
mf_blncdtree.sthlp
mf_somdtransf.sthlp
mf_u2jackpseud.sthlp
somersd.sthlp
somersd_mata.sthlp
ANCILLARY FILES (click here to get)
cendif.pdf
censlope.pdf
somersd.pdf
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