You are right, they (cochrane) conduct and publish systematic reviews and meta analyses, not the primary studies themselves. And this is regarded as higher-order evidence than RCTs or any other method. The are regarded as best in the world.
(not all of their research is a meta analysis, the systematic review part essentially has to find enough studies that fit the criterea before that can be done)
You are right, they (cochrane) conduct and publish systematic reviews and meta analyses, not the primary studies themselves. And this is regarded as higher-order evidence than RCTs or any other method. The are regarded as best in the world.
(not all of their research is a meta analysis, the systematic review part essentially has to find enough studies that fit the criterea before that can be done)