It is probably not going to work very well if you have some classes that
only have one member. You can eliminate members of classes that only
have a few members. If you really need to have those cases, there are
hybrid ways to analyze the data (but you can't use an FSGD at that point)
On 2/6/2022 10:41 PM, Zeng, Victor (BIDMC - Keshavan - Psychiatry) wrote:
External Email - Use Caution
Hi all,
I am doing an analysis and generating the FSGD. I understand sex and
race are classes in this context, but something I was also hoping to
regress out is the effects of scanner/sequences. We have a large
participant size, so we have around 10+ scanner/sequences, which makes
for a large amount of classes combinations, with some having just 1
(if not zero) fitting into a class.
Would you proceed with this nonetheless? If not, should
scanner/sequence be something that we consider? Should we find some
other way to adjust site (I don't think we can z-score...). Or can we
consider site/scanner as a continuous variable
Victor Zeng
Beth Israel Deaconess Medical Center
Keshavan Lab
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