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Did you add the same study twice in the meta-analysis?

Published online by Cambridge University Press:  02 January 2018

Andrea Cipriani
Andrea Cipriani*
Affiliation:
University of Oxford. Email: [email protected]
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The British Journal of Psychiatry , Volume 207 , Issue 2 , August 2015 , pp. 177
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Copyright © Royal College of Psychiatrists, 2015 

I read with interest the systematic review of pharmacotherapy for post-traumatic stress disorder (PTSD) by Mathew Hoskins and colleagues. Looking at Fig. 2 of the paper and at the online-only supplemental file, however, it seems to me that two unpublished studies have been counted twice in the meta-analysis. As far as I can see from the information reported in the review, the study ‘Eli Lilly’ is the same as ‘Martenyi 2007’ and ‘Pfizer 589’ is the same as ‘Friedman 2007’ (same drugs, same comparisons, same sample size). I would be grateful if the authors could clarify the matter.

References

1 Hoskins, M, Pearce, J, Bethell, A, Dankova, L, Barbui, C, Tol, QA, et al. Pharmacotherapy for post-traumatic stress disorder: systematic review and meta-analysis. Br J Psychiatry 2015; 206: 93–100.Google Scholar
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