st: New version of the -factext- package for SSC

[Roger Newson <roger.newson@kcl.ac.uk>]

Dear All

Thanks to Kit Baum, there is now a new version of the -factext- package 
downloadable from SSC. Type -ssc describe factext- in Web-aware Stata to 
find out more.

The -factext- program extracts values of categorical variables (factors) 
from the -label- variable in a data set output by the -parmest- package. 
(The -parmest- package is also on SSC, and converts estimation results to a 
data set with 1 observation per estimated parameter and data on estimates, 
confidence limits, P-values and other parameter attributes.). These 
categorical variables are typically entered into a regression model using 
the -xi- command (or possibly -tabulate- or -desmat-). The -factext- 
package allows the user to create tables and/or plots of confidence 
intervals for factor level effects in regression models, with one table row 
or data point for each level of each factor. The new version is still Stata 
7, but contains an additional program -factref-, which is used after the 
program -factext-, and adds to the data set one or more additional 
observations with reference values for the factors. Therefore, the user can 
create confidence interval plots (or tables) with a data point (or table 
row) for each level of a factor, including the reference level (which is 
typically associated with an additive effect size of zero or a relative 
risk of one). I usually create such confidence interval plots using Nick 
Cox's -hplot- package, also on SSC.

Best wishes

Roger

--
Roger Newson
Lecturer in Medical Statistics
Department of Public Health Sciences
King's College London
5th Floor, Capital House
42 Weston Street
London SE1 3QD
United Kingdom

Tel: 020 7848 6648 International +44 20 7848 6648
Fax: 020 7848 6620 International +44 20 7848 6620
  or 020 7848 6605 International +44 20 7848 6605
Email: roger.newson@kcl.ac.uk

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

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