Re: covariate significance

From: Lewis B. Sheiner Date: April 18, 2002 technical Source: cognigencorp.com
From: LSheiner Subject: Re: [NMusers] covariate significance Date: Thu, 18 Apr 2002 13:57:15 -0700 Looks like a peculiar model to me. If COV is continuous (e.;g., dose) then the two models to compare would be something like FULL: X = THETA(1) + THETA(2)*COV REDUCED: X = THETA(1) If COV is categorical (e.g., "small" medium" "large"), then the models to compare would be something like Q1=0 Q2=0 IF(COV.EQ.1) Q1 = 1 IF(COV.EQ.2) Q2 = 1 FULL: X = THETA(1) + THETA(2)*Q1 + THETA(3)*Q2 REDUCED: X = THETA(1) LBS. -- _/ _/ _/_/ _/_/_/ _/_/_/ Professor Lewis B Sheiner, MD _/ _/ _/ _/_ _/_/ mail: Box 0626, UCSF, SF, CA,94143 _/ _/ _/ _/ _/ courier: Rm C255, UCSF, SF, CA,94122 _/_/ _/_/ _/_/_/ _/ 415-476-1965 (v), 415-476-2796 (fax)

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Apr 18, 2002 Joern Loetsch covariate significance
Apr 18, 2002 Lewis B. Sheiner Re: covariate significance
Apr 18, 2002 Nick Holford Re: covariate significance
Apr 18, 2002 Erik Olofsen RE: covariate significance
Apr 19, 2002 Ruediger Port Re: covariate significance
Apr 21, 2002 Vladimir Piotrovskij RE: covariate significance
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