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. 2008 Nov 10;3(11):e3684. doi: 10.1371/journal.pone.0003684

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Tricco et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The cohort included a total of 411 Cochrane protocols and 379 (90.5%) remained after excluding 39. Of these protocols, 19.1% (71/372) were never published as full Cochrane reviews while 80.9% (301/372) were published in full.