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Very large treatment effects in randomised trials as an empirical marker to indicate whether subsequent trials are necessary: meta-epidemiological assessment

Abstract:
Objective: Most healthcare interventions provide modest benefits, but occasionally trials report very large improvements over existing treatments or inactive controls. This often leads to speculation that further trials may be unnecessary. We examined whether a very large effect (VLE, relative risk (RR) of ≤0.2 or ≥5) in a randomised trial could be an empirical marker that subsequent trials are unnecessary. Design: Meta-epidemiological assessment of existing... Expand abstract
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1136/bmj.i5432

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Institution:
University of Oxford
Division:
MSD
Department:
NDORMS
Sub department:
Centre for Statistics in Medicine
Role:
Author
Publisher:
BMJ Publishing Group Publisher's website
Journal:
BMJ Journal website
Volume:
355
Article number:
i5432
Publication date:
2016-01-01
Acceptance date:
2016-09-29
DOI:
ISSN:
1756-1833
Language:
English
Keywords:
Pubs id:
pubs:647839
UUID:
uuid:3fa2c745-9769-4c18-9d14-d6e724ca87ed
Local pid:
pubs:647839
Source identifiers:
647839
Deposit date:
2016-10-04

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