Yes, it is addressing that question. The contrast should be the same as your Group Diff below. Although I'm not sure you're using the proper design. It looks like you are using Sex as a continuous covariate? That is not correct. It should be discrete. So you should have 4 classes (HC-M, HC-F, PT-M, PT-F)
On 09/21/2015 09:31 AM, pablo najt wrote: > Hello FS experts, > I would like to understand the results from qdec in a GLM model with > Group (PT/HC), and two covariates (Age, gender). > I set up my contrast as follow: > > Group Diff > HC PT AgeHC AgePT SexHC SexPT > 1 -1 0 0 0 0 > > Group x Age effect > HC PT AgeHC AgePT SexHC SexPT > 0 0 1 -1 0 0 > > Group X Sex effect > HC PT AgeHC AgePT SexHC SexPT > 0 0 0 0 1 -1 > Continues just as indicated in the "2 Groups 2 Covariates example" > > What I would like to find out: /If there are group differences while > controlling for age and sex/. > > In Qdec I selected Group, Gender, and Age. (Age as normal variable, > not as nuisance) > However, when I open my results with Qdec I am not quite sure it is > answering my question. > > From all the questions listed I thought that the following was > addressing what I need, but would like to clarify. > "/Does the thickness, --Age correlation, accounting for Gender, differ > between HC and PT?"/ > Would you mind confirming this for me? > Thanks!! > Pablo > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list 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.
