[R-meta] Umbrella.meta analysis with metafor

[Michael Dewey]

Dear Nicolas

Can e just clarify what data you have and your scientific question?

As I understand it you have six existing reviews some (or all?) of which 
contained some (or all?) studies in common. Is your current plan to 
combine the summary estimates from the sixe reviews and you are 
concerned that this will count some data more than once? Ot are you 
planning to use the individual primary study results reported in the six 
reviews but only include the duplicated primary studies once?

Incidentally you posted in HTML which can result in your text being 
scrambled although in this case it has not caused any problem. I assume 
there is no way of getting rid of the signature file which was longer 
than your message.

Michael

On 24/05/2025 17:42, Cuenca Zaldivar.Juan Nicolas via 
R-sig-meta-analysis wrote:
> Hello, I am performing an umbrella review with meta analysis, for this, i have 6 reviews with common studies with 3 interventions, i know how doing network meta analysis with metafor r package, but for this i read that studies weights have take inaccount the number of times that appears across all reviews, how can I do it?
> 
> Many thanks in advanced
> 
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-- 
Michael Dewey