Intended for healthcare professionals

Papers

Association between competing interests and authors' conclusions: epidemiological study of randomised clinical trials published in the BMJ

BMJ 2002; 325 doi: https://doi.org/10.1136/bmj.325.7358.249 (Published 03 August 2002) Cite this as: BMJ 2002;325:249

Be aware of publication bias

Kjaergard and Als-Nielsen conclude that; "Trials of antipsychotic
drugs for schizophrenia funded by drug companies were more likely to show
a benefit of treatment."

More correctly, they should conclude that; "Reported trials of
antipsychotic drugs for schizophrenia funded by drug companies were more
likely to show a benefit of treatment."

Trials, funded by drug companies, that do not show benefits are less
likely to be published if the funder determines whether research gets
published or not.

Competing interests: No competing interests

18 August 2002
Ron Law
Beyond Alternative Solutions, Waitakere City, New Zealand