sdm-help-list > group analysis with two binary independents
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Nov 13, 2017  12:11 PM | Jorge Witman
group analysis with two binary independents
Dear expert, 

I am doing a group analysis for two dichotomous moderators (i.e., binary independents, one for instance is 'gender', 1 vs 0) with one of those two independents as covariate for the other. 

My questions are (1) Is this a valid analysis (I don't see why not, maybe there is a power problem with  k=14 studies) and (2) as I understand (not explicitly mentioned in the manual) SDM then generates contrasts maps with the following logical code:
10m00
10m01
etc

Am I correct that if I want to look at the effect of the first predictor controlling for the second, I need to look at 10m00?

Thanks a lot and best wishes
Dec 8, 2017  05:12 PM | Joaquim Radua
RE: group analysis with two binary...
Dear Jorge,

the analysis is valid, and as you say, the effect of the first predictor controlling for the second is shown at 10m00. That being said, the number of studies is a bit limited for fitting two moderators, so I would take the results with some caution unless they are clearly significant.

Hope this helps,

Joaquim
Dec 8, 2017  05:12 PM | Jorge Witman
RE: group analysis with two binary...
That helps a lot Joaquim. Moltes graceis.
Dec 8, 2017  06:12 PM | Joaquim Radua
RE: group analysis with two binary...
You are welcome!