Dear expert,

I'm currently doing a meta-analysis with SDM and I decided not to include multiple contrasts of 1 study (say a>b and b > c) because this would lead to 1 study driving the results more than others (and non-independence of input studies). Am I correct with this assertion or does SDM allow for the inclusion of multiple contrasts of 1 study?

Moltes gràcies,

Jurriaan

Dear Jurriaan

When a study includes multiple contrasts, one option is to only include the most relevant contrast as you did, but another option is to combine the multiple contrasts of the study in a single contrast (this can be done with the "Combine images" button). The first option may be  adequate when one of the contrasts is clearly more representative than the others, whereas the second option may be more adequate to increase the power.

Moltes gràcies!

Joaquim

Thanks for the clear answer. Best, Jurriaan