Table 2

Reporting of cautions with standardised wording

Study designStandardised text
Animal or laboratory study“The study was based on animals; it is impossible to know whether this treatment will work on humans or not.”
Small study“These results are based on a small study; larger studies are needed to understand whether the treatment works across a large population.”
Uncontrolled study/Lack of comparator“Everyone in this study took drug X. Without investigating patients who did not take that drug, it is impossible to know whether taking drug X accounted for the outcome.”
Controlled but not randomised study“The study participants were not randomized. We do not know whether it was drug X or something else that really accounted for the effect observed.”
Important adverse event“The benefit observed should be weighed against the adverse effects (or other downsides such as inconvenience, cost, etc).”