Dear Lydia,

Thank you for the responses, but I found the issue: I hadn't saved the text file as UTF-8.

I have a new question regarding my project: it is based on the comparison between a control group and patients concerning VBM grey matter.

After the meta-analysis, I conducted meta-regressions on various variables for a better understanding. One of my variables is the age of onset of the pathology. Thus, I would like to adjust for the age of the patients to ensure that the effect is linked to the age of onset of the pathology and not the age of the patients. Do you have a solution for this?

Best,

Thomas