RE: Centering (was Re: Missing covariates)

From: Matt Hutmacher Date: July 06, 2001 technical Source: cognigencorp.com
From: "HUTMACHER, MATTHEW [Non-Pharmacia/1825]" <matthew.hutmacher@pharmacia.com> Subject: RE: Centering (was Re: Missing covariates) Date: Fri, 6 Jul 2001 10:35:52 -0500 Alan, For categorical variables such as sex, race, etc., you could try parameterizing the model like: TVCL=(THETA(1)+Xi*THETA(2)) where Xi= 1 for females and Xi=-1 for males, for example. Then THETA(1) will be somewhat of a population average when Xi=0. This should help getting your covariate model to go through the center of your data like your structural model. Matt

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Jul 02, 2001 Nick Holford Centering (was Re: Missing covariates)
Jul 02, 2001 William Bachman RE: Centering (was Re: Missing covariates)
Jul 02, 2001 Kenneth G. Kowalski RE: Centering (was Re: Missing covariates)
Jul 02, 2001 Lewis B. Sheiner Centering (was Re: Missing covariates)
Jul 03, 2001 Jogarao Gobburu Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Nick Holford Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Lewis B. Sheiner Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 03, 2001 Diane Mould Re: Centering (was Re: Missing covariates)
Jul 04, 2001 Nick Holford Re: Centering (was Re: Missing covariates)
Jul 04, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 04, 2001 Diane Mould Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Nick Holford Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Stephen Duffull RE: Centering (was Re: Missing covariates)
Jul 05, 2001 Nick Holford Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Leon Aarons 70kg neonates
Jul 05, 2001 Nick Holford Re: 70kg neonates
Jul 05, 2001 Peter Bonate Centering
Jul 05, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Leonid Gibiansky RE: Centering (was Re: Missing covariates)
Jul 05, 2001 Kenneth G. Kowalski RE: Centering (was Re: Missing covariates)
Jul 05, 2001 William Bachman RE: Centering (was Re: Missing covariates)
Jul 05, 2001 Diane Mould Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 05, 2001 Alan Xiao Question 2 about prediction and covariates
Jul 06, 2001 Matt Hutmacher RE: Centering (was Re: Missing covariates)
Jul 09, 2001 Vladimir Piotrovskij RE: Centering (Impact on SE)
Jul 09, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 09, 2001 Kenneth G. Kowalski RE: Centering (Impact on SE)
Jul 09, 2001 Vladimir Piotrovskij RE: Centering (Impact on SE)
Jul 09, 2001 Smith Brian P RE: Centering (Impact on SE)
Jul 09, 2001 Matt Hutmacher RE: Centering (was Re: Missing covariates)
Jul 12, 2001 Juan Jose Perez Ruixo RE: Centering (was Re: Missing covariates)
Jul 12, 2001 Juan Jose Perez Ruixo RE: Centering (was Re: Missing covariates)
Jul 12, 2001 Matt Hutmacher RE: Centering (was Re: Missing covariates)
Jul 12, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 30, 2001 Juan Jose Perez Ruixo Re: Centering (was Re: Missing covariates)
Jul 30, 2001 Alan Xiao Re: Centering (was Re: Missing covariates)
Jul 30, 2001 Leonid Gibiansky RE: Centering (was Re: Missing covariates)
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