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. 2011:2011:1506-13.
Epub 2011 Oct 22.

Search filter precision can be improved by NOTing out irrelevant content

Nancy L Wilczynski  1 , K Ann McKibbon, R Brian Haynes
Affiliations

Search filter precision can be improved by NOTing out irrelevant content

Nancy L Wilczynski et al. AMIA Annu Symp Proc. 2011.

Abstract

Background: Most methodologic search filters developed for use in large electronic databases such as MEDLINE have low precision. One method that has been proposed but not tested for improving precision is NOTing out irrelevant content.

Objective: To determine if search filter precision can be improved by NOTing out the text words and index terms assigned to those articles that are retrieved but are off-target.

Design: Analytic survey.

Methods: NOTing out unique terms in off-target articles and testing search filter performance in the Clinical Hedges Database.

Main outcome measures: Sensitivity, specificity, precision and number needed to read (NNR).

Results: For all purpose categories (diagnosis, prognosis and etiology) except treatment and for all databases (MEDLINE, EMBASE, CINAHL and PsycINFO), constructing search filters that NOTed out irrelevant content resulted in substantive improvements in NNR (over four-fold for some purpose categories and databases).

Conclusion: Search filter precision can be improved by NOTing out irrelevant content.

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References

    1. Sahapong S, Manmart L, Ayuvat D, Potisat S. Information use behavior of clinicians in evidence-based medicine process in Thailand. J Med Assoc Thai. 2009;92:435–41. - PubMed
    1. McCord G, Smucker WD, Selius BA, et al. Answering questions at the point of care: do residents practice EBM or manage information sources? Acad Med. 2007;82:298–303. - PubMed
    1. Green ML, Ciampi MA, Ellis PJ. Residents’ medical information needs in clinic: are they being met? Am J Med. 2000;109:218–23. - PubMed
    1. Ely JW, Osheroff JA, Chambliss ML, Embell MH, Rosenbaum ME. Answering physicians’ clinical questions: obstacles and potential solutions. BMJ. 2005;12:217–24. - PMC - PubMed
    1. Ulvenes LV, Aaslad O, Nylenna M, Kristiansen IS. Norwegian physicians’ knowledge of and opinions about evidence-based medicine: cross-sectional study. PLoS One. 2009;4:e7828. - PMC - PubMed

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