Hierarchy of scientific evidence (Infographic)

Last Updated : 01 March 2017

The strength of scientific evidence produced by different types of studies (for instance systematic reviews, meta-analyses, randomised control trials, observational research, animal studies, cell studies and expert opinions) can vary.  This infographic will help you understand the advantages and limitations of different types of scientific evidence.

Download the printable PDF version here.

Infographic on how strong is the scientific evidence