Dear Kersten, I have a question about LME model. After I acquired p value, could I know which group is bigger?
Thanks, Lanbo On Fri, Mar 16, 2018 at 12:13 AM, lanbo Wang <drram...@gmail.com> wrote: > Dear Kersten, > > Thanks a lot, it's really help. I have another question, after I got > results that two group have significant, then how could I get direction? > > Thanks, > Lanbo > > On Tue, Mar 13, 2018 at 5:40 PM, Diers, Kersten /DZNE < > kersten.di...@dzne.de> wrote: > >> Hello, >> >> On Di, 2018-03-13 at 21:48 +0100, lanbo Wang wrote: >> > Dear Kersten, >> > >> > Thanks, I find it. And I have other questions: >> > 1. The intercepts all set as one, so in this model it doesn't >> > separate different subjects, or can say no individual subject change >> > rate? >> >> If I understood correctly, the question is whether or not we can get >> estimates for individual slopes across time? >> >> If so, then yes, that's possible - but I'd have to run an analysis >> myself and look up how to do it exactly - I'll get back on this. >> >> > 2. Should we set age according to different timepoint, or just use >> > baseline age? >> >> It's better to use age at baseline. >> >> One of the nice things of the LME is that it can separate the cross- >> sectional effect of age (at baseline) and the longitudinal effect of >> aging (=effect of time). So the aging effect is already incorporated >> within the 'time since baseline' variable, which of course should also >> be present in the model. >> >> Since it is difficult to estimate and interpret effects that are very >> redundant (such as time vs age at each timepoint), it's better to just >> use age at baseline for the other regressor. >> >> Best regards, >> >> Kersten >> >> > Thanks, >> > Lanbo >> > >> > On Tue, Mar 13, 2018 at 3:34 PM, Diers, Kersten /DZNE <Kersten.Diers@ >> > dzne.de<mailto:kersten.di...@dzne.de>> wrote: >> > Hello Lanbo, >> > >> > the univariate example data can actually be downloaded from the LME >> > tutorial website: >> > >> > Search for: "An optional sample dataset which can be used to become >> > familiar with the LME Matlab tools can be found here". The linked >> > tar.gz archive contains two folders, one for the univariate and one >> > for >> > the mass-univariate example data. >> > >> > Best regards, >> > >> > Kersten >> > >> > On Di, 2018-03-13 at 13:38 +0100, lanbo Wang wrote: >> > > >> > > Dear Experts, >> > > >> > > Hi, >> > > There is no example detail on website of LME tutorial. I have some >> > > question about it. >> > > Could you send me the table of ADNI univariate example data? >> > > >> > > >> > > Thanks, >> > > Lanbo >> > _______________________________________________ >> > Freesurfer mailing list >> > Freesurfer@nmr.mgh.harvard.edu<mailto:Freesurfer@nmr.mgh.harvard.edu> >> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> > >> > >> > The information in this e-mail is intended only for the person to >> > whom it is >> > addressed. If you believe this e-mail was sent to you in error and >> > the e-mail >> > contains patient information, please contact the Partners Compliance >> > HelpLine at >> > http://www.partners.org/complianceline . If the e-mail was sent to >> > you in error >> > but does not contain patient information, please contact the sender >> > and properly >> > dispose of the e-mail. >> > >> > >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> > >
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