Dear FreeSurfer Group<div><br></div><div>I wanted to Group Analysis with qdec. I have MRIs of one patient in two different dates and I wanted to do group analysis on them to see the changes.</div><div>I have &quot;gender&quot;, &quot;age&quot;, and &quot;diagnosis&quot;.</div>
<div>In qdec deme, when I make the analysis based on &quot;thickness&quot;, I receive the attached error. I do not know what is the reason. Any help and advice would be appreciated.</div><div><br></div><div>Thanks,</div><div>
Nooshin  </div><div><div><br></div><div><br><div><br></div><div><br></div></div></div>