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st: Population Attributable Fraction (PAF) estimation


From   "roger webb" <roger.webb@manchester.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: Population Attributable Fraction (PAF) estimation
Date   Fri, 6 May 2005 14:09:10 +0100

Dear Statalist members,

I have encountered considerable problems in using the 'aflogit.ado' 
program (STB-42 sbe21) to estimate adjusted PAFs . These are 
some of them:

1) Unable to estimate PAFs following conditional logistic 
regression (clogit)

2) Unable to estimate PAFs following poisson regression with 
aggregated person-years data and interaction terms between 
explanatory variables

3) Error message ("option cc not allowed") when trying to use the 
cc option (i.e. "aflogit, cc") to specify that data are from a case-
control design rather than a cross-sectional or cohort study.

4) Generation of invalid estimates when the 'if' command is used to 
restrict the data set

Does anyone know a of simple and more reliable way of obtaining 
adjusted PAFs following logistic, poisson and Cox regression 
modelling?

Are there any plans to incorporate a flexible and valid adjusted PAF 
estimator into future versions of Stata that can deal with a variety of 
different regression models?

Is this currently possible in any other statistical packages?

Thanks and best wishes,

Roger Webb 
Research Fellow
University of Manchester (UK)
 


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