1) You don't include sex as a covariate. Include it as a class (ie, Class Male and Class Female rather than Class Main). 2) You need to include Minutes in your null hypothesis. 3) Include minutes as a covariate as you have done, then create the proper contrast matrix. The contrast matrix will depend on the classes you set up
You can also see https://surfer.nmr.mgh.harvard.edu/fswiki/FsgdExamples
On 6/1/16 9:03 AM, jahanvi patel wrote:
Dear list,
We have a question about the set up of the FSGD file.
We have 1 group, 2 continued covariates (age & mintues), 1 discontinued covariate (sex)
GroupDescriptorFile 1 Title G1V3 Class Main Variables Age Sex Minutes Input subject1 Main 30 0 1200 Input subject2 Main 40 1 180
My question is
- How to enter the column "sex" in FSGD.
Can I input 1 for Male and 0 for Female?
- What would be the Main Contrast (regress out effect of sex & age)?
(Null Hypothesis: the intercept/offset is different than 0 after regressing out the effects of age and sex)
- If I want to correlate the continued variable (minutes) with the
Thickness, is it correct in this way ? :
0 0 0 1
Thanks so much
Jahanvi
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