Hi, I think the thing to be aware of is that some randomised
controlled trials may not be spotted by the database indexers and so
may not receive the correct PT. Especially if the authors have not
been very explicit in their abstract that the study is randomised.
Regards
Julie
Julie Glanville
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On 17 April 2012 14:09, Ahmed M. Abou-Setta, MD <[log in to unmask]> wrote:
> Hi Susan,
>
>
>
> I have been faithfully using the Cochrane Highly Sensitive Search Strategy
> for years without ever questioning it. I think the recent discussion on how
> to cut down the workload to allow more efficient reviews (e.g. rapid
> reviews) is what triggered my curiosity. For example, if the study is
> indexed in PubMed, then why are we searching "randomized controlled
> trial"[pt] OR "controlled clinical trial"[pt]. Either it is indexed as an
> RCT or not (unless we are searching for quasi-randomized trials). Same goes
> for the MeSH term “drug therapy”
>
>
>
> Ahmed
>
>
>
>
>
> From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of
> Susan Fowler
> Sent: Tuesday, April 17, 2012 7:19 AM
> To: Ahmed Abou-Setta, M.D.
> Cc: [log in to unmask]
> Subject: Re: Randomized trials and MeSH terms
>
>
>
> Ahmed: I don't the answers to your questions specifically. I add the
> following search filter as outlined in the Cochrane Handbook for Systematic
> Reviews 6.4.11, to make sure I pick up all possible RCTs...
>
> "randomized controlled trial"[pt] OR "controlled clinical trial"[pt] OR
> randomized[tiab] OR placebo[tiab] OR "drug therapy"[sh] OR randomly[tiab] OR
> trial[tiab] OR groups[tiab]
>
> http://www.cochrane-handbook.org/
>
> --
> Susan Fowler, MLIS
> Medical Librarian
>
> Evidence at Becker:
> http://beckerguides.wustl.edu/ebm
>
> Mobile Resources Guide:
> http://beckerguides.wustl.edu/mobileresources
>
> Becker Medical Library, Washington University in St. Louis
> 314-362-8092
> [log in to unmask]
>
> On Mon, Apr 16, 2012 at 1:22 PM, Ahmed Abou-Setta, M.D.
> <[log in to unmask]> wrote:
>
> PubMed (Medline) is one of the most accessed resources by clinicians and
> researchers. And even though the system is well-maintained, it often lags
> behind in the indexing process, and this process seems to be uneven
> depending on factors other than the date of publication. Even when citations
> are indexed in PubMed, there seems to be several categories related to being
> related to 'random'.
>
> After searching the MeSH database, I have identified the following related
> terms:
>
> Publication type:
> 1) Randomized Controlled Trial (http://www.ncbi.nlm.nih.gov/mesh/68016449)
> 2) Controlled Clinical Trial (http://www.ncbi.nlm.nih.gov/mesh/68018848)
>
> MeSH term:
> 3) Randomized Controlled Trials as Topic
> (http://www.ncbi.nlm.nih.gov/mesh/68016032)
> 4) Random Allocation (http://www.ncbi.nlm.nih.gov/mesh/68011897)
>
> Problem seems to be that overlap very poorly with each other. From a limited
> experiment, it seems that "Randomized Controlled Trial"[Publication Type]
> seems to be one related to what we would consider as randomized controlled
> trials.
>
> My questions are:
>
> 1) Does anyone know how NCBI classifies each study design and why there is
> poor correlation between these related terms?
> 2) Does anyone know how to search only non-indexed citations?
>
> Thanks.
>
> Ahmed
>
>
>
>
>
>
>
>
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