Ritchie
Member
- Joined
- Nov 22, 2015
- Messages
- 490
Well it may be a meta-analyses of many strong, well conducted double blind randomised control trials in humans. This would be a very powerful meta analyses and/or systematic review. It obviously depends on what science the meta analyses and systematic reviews are based on, and ideally they want to be based on randomised controlled trials in humans, or perhaps cohort studies. The further down the pyramid you go the less power the study will have.No way "Meta-Analyses and Systematic Reviews" should be at the top. I'd put those below case reports, personally.
Case reports are completely uncontrolled and massively subjective of the reporter, generally very bad science and they are at the bottom of the heirarchy for what should be obvious reasons. Case-control studies are far better.