The authors clarify that a potentially fraudulent study on body weight management was already considered low-quality and excluded from their systematic review's effect estimates.
The letter by Colquhoun et al points to the fact that during the publication of our review, 1 simultaneous reports of an international research fraud investigation appeared, raising suspicion of the work of R.B. Singh. In our review, we used 3 publications by this author, which describe the dietary effects on mortality in coronary artery disease patients: 1 study on body weight management 2 and 2 on combined dietary interventions. he letter of Colquhoun et al reinforces the view already expressed in our review. Studies on body weight management in coronary artery disease patients are insufficient to provide a reliable estimate of the mortality effect. The study by Singh on this issue 2 was already considered a low-quality study and not used in an effect estimate.
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Iestra et al. (2006) studied this question.
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