Hi all,
We're using QDEC DODS to compare the average thickness maps of patients V. controls using sex and age as covariates. The results are identical for "Does the average thickness differ between patientsVscontrols with sex and age as covariates" and "Does the average thickness differ between sex with patientsVscontrols and age as covariates". This doesn't seem to make sense (with my limited statistical knowledge) because the criterion variable has changed. Also it is not the case that the groups contain only one sex. Could anyone shed light on this?
Also, we tried to check the contrasts but weren't able to find the categories for each of the columns in the vector. Where can this be found?
Thanks very much in advance,
Dominic
Melbourne Neuropsychiatry Centre