Randomized Clinical Trial Results in PubMed
Thursday, February 2nd, 2012Of recent interest to medical librarians is an article that was published in BMJ regarding search results in PubMed and how evidence from randomized clinical trials is retrieved. Here is some updated information from the National Library of Medicine, Bibliographic Services Division:
Re: Wieland LS, Robinson KA, Dickersin K. Understanding why evidence from randomised clinical trials may not be retrieved from Medline: comparison of
indexed and non-indexed records. BMJ. 2012 Jan 3;344:d7501. doi: 10.1136/bmj.d7501. PubMed PMID: 22214757.
Readers of this article should recognize that the authors assumed no changes took place in the NLM indexing of Randomized Controlled Trial
[publication type]. In fact, NLM has made changes since 2005 that we think affect the conclusions and projections made in the article. These changes
are: (more…)



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