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Higher- versus lower-protein diets

European Journal of Clinical Nutrition volume 66, pages 1372–1373 (2012)Cite this article

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Long-term studies (≥ 12 months) only were included in our meta-analyses. In this regard, we would like to know why Santesso et al.1 did not include some of these RCTs in their own systematic review (search to July 2011). As far as the inclusion and exclusion criteria are concerned, the following studies should have been taken into account: Clifton et al.,2 Brinkworth et al.3

We used both post-intervention values as well as changes in mean differences, as suggested by the Cochrane Collaboration4 to avoid a standardized mean differences method, whereas Santesso et al. separated between primary (change from baseline values) and secondary (final values) analyses.

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References

  1. Santesso N, Akl EA, Bianchi M, Mente A, Mustafa R, Heels-Ansdell D et al. Effects of higher- versus lower-protein diets on health outcomes: a systematic review and meta-analysis. Eur J Clin Nutr 2012; 66: 780–788.

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  2. Clifton PM, Keogh JB, Noakes M . Long-term effects of a high-protein weight-loss diet. Am J Clin Nutr 2008; 87: 23–29.

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  3. Brinkworth GD, Noakes M, Keogh JB, Luscombe ND, Wittert GA, Clifton PM . Long-term effects of a high-protein, low-carbohydrate diet on weight control and cardiovascular risk markers in obese hyperinsulinemic subjects. Int J Obes Relat Metab Disord 2004; 28: 661–670.

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  4. Higgins JP, Green S Cochrane Handbook of Systematic Reviews, version 5.1.0 (updated March 2011). http://www.cochrane-handbook.org/.

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Authors and Affiliations

  1. Department of Nutritional Sciences, Faculty of Life Sciences, University of Vienna, Althanstraße 14 (UZII), Vienna, Austria

    L Schwingshackl & G Hoffmann

Authors
  1. L Schwingshackl
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  2. G Hoffmann
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Correspondence to L Schwingshackl.

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The authors declare no conflict of interest.

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Schwingshackl, L., Hoffmann, G. Higher- versus lower-protein diets. Eur J Clin Nutr 66, 1372–1373 (2012). https://doi.org/10.1038/ejcn.2012.154

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