https://www.ncbi.nlm.nih.gov/pmc/arti...
I = Meta analyses or RCT with clear cut results
II = Small RCT with unclear results
III = Cohort or case control study
IV = Historical cohort of case-control studies
V = Case series studies with no controls
Practice recommendations
A = Strong recommendation
Level I evidence or consistent findings
B = Recommendation
Level II, III or IV but consistent
C = Opinion
Evidence but inconsistent
D = Opinion
Level V evidence or no systematic empirical evidence
Research on covid-19 is suffering “imperfect incentives at every stage” (28th May)
https://www.bmj.com/content/369/bmj.m...
Cite bate
Scientists and journalists
Journalists are reporting on more preprint studies that have not been peer reviewed and vary in quality
What we are seeing is worrying signs of a compromise in quality
There is an urgent need for data and knowledge, but false information is worse than no information
2181 publications
304 (14%) primary research papers,
218 (72%) of primary papers observational
82 (27%) of which peer reviewed
Therefore 3.7% of all publications peer reviewed primary research
Greater transparency needed
Posts
