Hello,
I'm doing a network meta analysis.
There are 2 control groups: standard care and placebo. Intervention A and intervention B were compared to Standard care. Intervention C and intervention D were compared to Placebo (the picture attached)
I wonder should I combine 2 control groups into 1 control group (because both of them have no effectiveness) or should I present 2 sub networks.
Thanks in advance.
Dear Ngan Ta ,
ost Cochrane Reviews present comparisons between pairs of interventions (an experimental intervention and a comparator intervention) for a specific condition and in a specific population or setting. However, it is usually the case that several, perhaps even numerous, competing interventions are available for any given condition. People who need to decide between alternative interventions would benefit from a single review that includes all relevant interventions, and presents their comparative effectiveness and potential for harm. Network meta-analysis provides an analysis option for such a review.
https://training.cochrane.org/handbook/current/chapter-11
Regards,
Shafagat
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