Letters
Multiple significance tests
BMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6986.1073 (Published 22 April 1995) Cite this as: BMJ 1995;310:1073
- Simon Voss,
- Steve George
- Medical adviser Southampton and South West Hampshire Health Commission, Southampton SO9 4WQ
- Senior lecturer in public health meicine Wessex Institute of Public Health Medicine, Southampton General Hospital, Southampton SO9 4XY
EDITOR,—J Martin Bland and Douglas G Altman highlight the need, in significance testing, to take account of simultaneous tests that are not independent.1 This is a common situation in investigations of outbreaks of food poisoning. Such investigations usually take the form of a cohort or case-control study based on a questionnaire that contains questions about all, or as many as are known, of …
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