23 Jan
2012
23 Jan
'12
1:35 p.m.
Hello Experts,
I am analyzing cortical thickness of two groups (APOE 4carries vs. noncarriers) in freesurfer with age as a co-variate. I am uncertain about the statistical differences behind: 1)Does the correlation between thickness and age accounting for APOE, differ from 0?
in contrast to:
2)Does the thickness-age correlation differ between 1 and 0?
I get significant results after FDR correction for the first but not for the second analysis.
thank you for your help, catherine