Dear Gabriel,
Peelle et al., 2012 (https://www.ncbi.nlm.nih.gov/pubmed/22261375)
tackles that issue with differences in inferring from certain
approaches. It could be a nice place to start.
Best,
Jacek M.
W dniu 14.12.2018 o 22:36, gabriel robert pisze:
> Dear SPM (VBM) community,
>
> We performed a longitudinal grey matter volume analyses using the SPM
> 12 pairwise tool and we controlled for baseline TIV as a global (as a
> covariate in the model, calculated using new segment). We had a
> comment from a reviewer saying we should control for total grey matter
> instead of TIV.
>
> I checked the archives of the list and read some papers but I could
> not find a paper which directly address the comparison of the 2 globals.
>
> Do you have any arguments for both approaches ? Ideally, would you
> have some articles to strenghten each position?
>
> Many thanks for your help,
>
> Best wishes,
>
> Gabriel
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Laboratory of Brain Imaging (LOBI)
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