Intended for healthcare professionals

Letters Calorie labelling on high street

Serious methodological flaws compromise study findings

BMJ 2011; 343 doi: (Published 13 September 2011) Cite this as: BMJ 2011;343:d5797
  1. Aakanksha H Pande, PhD candidate1,
  2. Stephen B Soumerai, professor of population medicine1
  1. 1Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, 133 Brookline Street, Boston, MA 02215, USA
  1. apande{at}

Dumanovsky and colleagues investigated the effect of calorie labelling in restaurants.1 However, their study uses one of the weakest research designs (uncontrolled pre-post study) that would not merit inclusion in a Cochrane Systematic Review of health systems. This un-interpretable paper has received widespread publicity and has been presented as a causal argument against labelling food …

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