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2008 Jan 22
2
Help - linear regression
...(p=.076)
in my dataset mean age is 55.2 years in the non-europeans and 56.7 years in the europeans (p <0.0001 by t.test).
should I or should I not include the interaction (age*race) in the model. Is it an acceptable rule to put in interactions if there is a significant relation between the indepenedent variables in univariate analyses.
Many thanks
bragadeesh
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