Letters Cycling and health

Pernicious use of surrogate markers

BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d302 (Published 19 January 2011) Cite this as: BMJ 2011;342:d302
  1. Denis Crankshaw, professor1
  1. 1Department of Obstetrics and Gynaecology, McMaster University, HSC 3N52, Hamilton, ON, Canada L8N 3Z5
  1. cranksha@mcmaster.ca

I am delighted that the BMJ recognises the importance of bicycles to international health.1 However, the article is seriously flawed. First reports in a new field tend to be the most cited, regardless of subsequent and contrary evidence from better designed studies. Why has the BMJ allowed open access to this work? Now, rather than …

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