Letters Diet and cardiovascular risk

Research authors’ reply to Campillo-Soto and Freedhoff

BMJ 2012; 345 doi: http://dx.doi.org/10.1136/bmj.e5112 (Published 06 August 2012) Cite this as: BMJ 2012;345:e5112
  1. Pagona Lagiou, professor12,
  2. Sven Sandin, scientist3,
  3. Marie Lof, scientist34,
  4. Dimitrios Trichopoulos, professor25,
  5. Hans-Olov Adami, professor23,
  6. Elisabete Weiderpass, professor367
  1. 1Department of Hygiene and Epidemiology, University of Athens Medical School, Goudi, GR-115 27, Athens, Greece
  2. 2Department of Epidemiology, Harvard School of Public Health, Boston, USA
  3. 3Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
  4. 4Department of Clinical and Experimental Medicine, University of Linköping, Linköping, Sweden
  5. 5Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
  6. 6Cancer Registry of Norway, Oslo, Norway
  7. 7Folkhälsan Research Center, Samfundet Folkhälsan, Helsinki, Finland
  1. pdlagiou{at}med.uoa.gr

Campillo-Soto repeatedly mentions “biases” but uses this epidemiological term loosely and unconventionally.1 2 Selection bias is not really a concern in a cohort study and neither is measurement bias—assessment of exposures cannot be differentially affected by the outcome if it is not known when the exposure is reported. In his …

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