afni.nimh.nih.gov

> All I want to know is what are the omnibus differences among the three groups, but
> I want to do this while "controling/adjusting " for the effect of Age.

If you center the covariate "Age" properly, such an omnibus F-stat is automatically provided in the output from 3dMVM. And you don't need to make a request through -gltCode.

Gang