Hi all,I have some questions about the covariants of regression. My target: To explore the trend of CD4 level through a period of time.
Response variable: CD4 count Explanatory variable:time Also, the demology information is available,such as gender,occupation,income level... Q1,Are these variables of demology information called covariant? Q2,How can I correct the impact of "covariant" so that I can get the "corrected result" of CD4's change through the time period? Q3,How to treat the covariants in regression?I've looked up to many papers of R on regression,which treat the covariant in the same way as the Explanatory variable,like following: lm(CD4 ~ time + gender + income) >From above expression of regression,it's obvious that the response variables and covariants are treated the same way,but acturally they are totally different. Thanks for your help. My best. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.