24 Sep
2013
24 Sep
'13
5:39 a.m.
Dear FreeSurfer experts,
I want to test linear, square and cubic effects of age on different parameters (thickness, lGI....) with qdec.
I add age (square) and age (cubic) as column in my qdec table.
Am i right to see only the square effects: Add Age square as continous factor and age (maybe age cubic too?) as nuisance factor in the model.
Best wishes and thanks a lot.
Daniel