Dear Prof Yan
I have some questions about statistical analysis.
In our study, all patients were assigned to three groups, with two different medication treatment and one medication-naive control. And all these patients accepted MRI scan at baseline and after 12 weeks. Now, my question is as followings:
1. Can we compare the group × time interaction effects on brain activity indicators by repeated measures ANOVA, such as ALFF,fALFF and ReHo. At first, I try to do this by mixed-effects comparison, but it can only treat two factors.
2.How can I do the post-hoc analysis by using DPABI?
3. How should I display the final results?
Thanks!
Best!
Fu
Forums
1. DPABI only supports 2x2.
1. DPABI only supports 2x2. You can try SPM.
2. You can do simple effect analysis -> 3. Just extract the ROI values and plot.
2×2 mixed effects error
感谢严老师的指导！我在使用DPABI 5.0 中的2×2 Mixed Effect 分析后，使用viewer打开生成的interaction F.nii文件时报错，不能打开，而生成的ConditionEffect_T.nii和Group_TwoT.nii 可以正常显示，请问可能是什么原因呢？报错代码如下：
我想你在微信群里应该解决了这个问题？
我想你在微信群里应该解决了这个问题？
是协变量设置有误。前后测一样的变量（如性别、年龄）不能做为协变量。