Reviewer's report Title : Exploring integrative medicine for back and neck pain-a pragmatic randomised clinical pilot trial Version : 2 Date : 8 June 2009

Content Provider	Semantic Scholar
Author	Poitras, Stéphane
Abstract	1. Comment #8. The authors should be applauded to have collected data to assess possible contamination between groups (table 3). However, results seem to demonstrate that there was extensive contamination in the conventional arm, which could partly explain the lack of difference between groups. More than a quarter (25.5-33.3%) of the subjects in the conventional arm appeared to have received complementary therapies. Although I agree with the advantages of a pragmatic trial, this contamination makes it difficult to isolate the effectiveness of the IM. This was partly discussed by the authors on p. 15 and 16, but contamination and its impact on the results should be further discussed.
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