That contrast vector (0 0 1 -1) will compute the interaction between group and age
On 6/6/17 9:25 PM, Gwang-Won Kim wrote:
Hello FreeSurfer Developers,
To compare cortical thickness between groups, I want to process analysis of covariance (ANCOVA) adjusting for age. When "mri_glmfit" process, do I insert "0 0 1 -1" in .mtx file? Would you please tell me how to process ANCOVA with age as covariate.
FSGD FILE Class Group1 Class Group2 Variables Age Input subject1 Group1 30 Input subject2 Group2 40 Input subject3 Group1 25 Input subject4 Group2 44 Input subject5 Group1 33 Input subject6 Group1 32 Input subject7 Group2 44 Input subject8 Group2 42
FreeSurfer version: 6.0
Platform: CentOS release 6.8
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Douglas Greve -
Gwang-Won Kim