Letters Intervention in colorectal cancer screening

The dilemma of crossover versus long term results in randomised controlled trials

BMJ 2014; 348 doi: https://doi.org/10.1136/bmj.g2679 (Published 09 April 2014) Cite this as: BMJ 2014;348:g2679
  1. I Peng Thomas Soh, medical oncologist1
  1. 1National University Cancer Institute, Singapore 119228
  1. thomas_soh{at}nuhs.edu.sg

Anderson and colleagues’ study on the impact of a bodyweight and physical activity intervention targeted patients who have had a positive faecal occult blood test and colonoscopy—a highly motivated population.1

The intervention group lost an average …

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