You should post this on the r-sig-mixed-models list rather than here.
Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Thu, Feb 25, 2021 at 9:20 AM Laura Coco <laurac...@gmail.com> wrote: > Hello, > > I am interested in investigating the main effects of group, time, and group > by time interaction on survey outcomes using linear mixed effects models. > Time is considered as continuous (number of days since baseline), but isn't > it also categorical, since I want to compare Session 1 vs Session 4 (for > example)? How is that handled in the model? As of now, time (days since > baseline) is being treated as one unit, rather than four separate sessions. > > Here is an example of my code: mdl.outcome <- lmer(outcome ~ time*Group + > (1 | PID), data = dta) > > Thank you!! > laura > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
