British Doctors Aspirin Trial

British Doctors Aspirin Trial

A randomised controlled trial begun in 1980 that was designed to test chemoprevention with aspirin, which was being used for the primary prevention of vascular disease. Meta-analysis of the BDAT and other data concluded that 75 mg (or more) of aspirin reduces the incidence and mortality of colorectal carcinoma.
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Their analysis focused on the British Doctors Aspirin Trial and the UK Transient Ischaemic Attack Aspirin Trial; there was a median follow-up of 23 years in both trials.
The British Doctors Aspirin Trial randomized doctors in 1978 and 1979 into a group of 3,429 taking a daily dose of 500 mg of aspirin and a control group of 1,710 who took nothing.

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