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Searching the Biomedical Literature : concepts
1. Tips to search the literature Concepts Patrice X. CHALON, Msc Knowledge manager, Centre fédéral d'expertise des soins de santé (KCE) 2010-09-10 Patrice X. Chalon
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3. 1. IDENTIFY YOUR PROBLEM Image source : http://www.flickr.com/photos/crystaljingsr/3914729343/ 2010-09-10 Patrice X. Chalon
7. Example Source : Horsmans Y, Thiry N, le Polain M, Adler M, Colle I, Delwaide J, Michielsen P, Orlent H, Van Damme P, Hulstaert F. Rapport coût-efficacité du traitement antiviral de l’hépatite B chronique en Belgique. Partie 1: Examen de la littérature et résultats d’une étude nationale. Health Technology Assessment (HTA). Bruxelles: Centre fédéral d’expertise des soins de santé (KCE). 2010. KCE Reports 127B. D/2010/10.2738/23. 2010-09-10 Patrice X. Chalon
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9. TRUNCATION 2010-09-10 Patrice X. Chalon Variants Economical vs Economics Economic* 0-n Singular vs Plural Stent vs Stents Stent? 0-1 EN-us vs EN-uk Hematology vs Haematology H?ematology 0-1 Prefixes Pre natal vs prenatal vs pre-natal Pre?natal 0-1
13. Example (cont.) (CHB OR (Hepatitis B ADJ2 Chronic * )) AND (NA OR (Nuclo ? ide ADJ2 analogue) OR (Interferon ADJ3 therap * ) ) 2010-09-10 Patrice X. Chalon
14. 3. FIND THE BEST EVIDENCE Image souyrce : http://www.flickr.com/photos/crystaljingsr/3915514724 2010-09-10 Patrice X. Chalon
15. Evidence pyramid Based on: http://smlweb.aub.edu.lb/Tutorial.aspx?file=Tutorials/principles.html and http://nyu.libguides.com/content.php?pid=27011&sid=234199#systematic 2010-09-10 Patrice X. Chalon Non filtered information Filtered information
16. Type of Source of Evidence Source. CEBAM 2010-09-10 Patrice X. Chalon
17. Search strategy quadrant 2010-09-10 Patrice X. Chalon pertinent Not pertinent Not identified SILENCE identified NOISE
20. Bibliographic indexes Index to articles Image source : http://www.nlm.nih.gov/hmd/sowhatsnew/images/3a7-a.jpg 2010-09-10 Patrice X. Chalon
21. Content of a record So = Jo, Dp, Vo, Is, Pg Eur J Nucl Med, 2000, 27 (1): 91-7 Au Mijnhout GS, Hooft L, van Tulder MW, Deville WL, Teule GJ and Hoekstra OS Ti How to perform a comprehensive search for FDG-PET literature . Ab In this study, a comprehensive, unbiassed search strategy for identifying literature on fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET) in Medline, Embase and Current Contents was developed, … Kw, SH. Abstracting and Indexing ; Databases, Bibliographic ; Fludeoxyglucose F 18/ diagnostic use ; Fluorine Radioisotopes/ diagnostic use; Human ; Medline ; Periodicals ; Radiopharmaceuticals/ diagnostic use ; Research ; Subject Headings ; Tomography, Emission-Computed Others : Ad, ISSN, La, URL, References,… Manual / Automatic ? Traduced title ? Accurate ? Keywords or Subject Headings ? Source: MedLine Particle ! Manual / Automatic ? 2010-09-10 Patrice X. Chalon
52. Thank you! Acknowledgments : Micheline Gobert, CEBAM; Nancy Thiry, Catherine Garreyn, KCE Copyrights : This work is released under Creative Commons License 2010-09-10 Patrice X. Chalon
Notes de l'éditeur
Nuclo?ide = nucleoside or nucleotide
Physician NEAR relationship retrieves records that contain the words in the same field E.g. both words in the Title; in the abstract, and so on physician adj5 relationship retrieves records that contain the words physician and relationship within five words of each other in either direction . E.g. physician patient relationship , patient physician relationship , relationship of the physician to the patient , and so on. Source: http://www.ovid.com.vdicp.health.fgov.be:8080/site/help/documentation/ospb/en/syntax.htm#operators
The OR operator lets you retrieve records that contain any of your search terms. For example, the search heart attack or myocardial infarction retrieves records that contain heart attack, myocardial infarction or both terms. Results are all inclusive The AND operator lets you retrieve only those records that include all of your search terms. For example, the search blood pressure and stroke retrieves only those records that contain both terms blood pressure and stroke together in the same record. Results exclude records that do not contain both terms.
The NOT operator lets you retrieve records that contain your first term but exclude the second term. In this way, you can restrict the scope of your results. For example, the search health reform not health maintenance organizations retrieves only those records that contain the term health reform but exclude the term health maintenance organizations. http://www.ovid.com.vdicp.health.fgov.be:8080/site/help/documentation/ospb/en/syntax.htm#operators 1 deoxyglucose.ti.ab.rw.sh 2 deoxy-glucose.ti.ab.rw.sh 3 fluorodeoxyglucose.ti.ab.rw.sh 4 18fluorodeoxyglucose.ti.ab.rw.sh 5 fluodeoxyglucose.ti.ab.rw.sh 6 fdg$.ti.ab.rw.sh 7 18fdg.ti.ab.rw.sh 8 f-18-dg.ti.ab.rw.sh 9 fluoro-2-deoxy-d-glucose.ti.ab.rw.sh 10 2fluoro-2deoxyglucose.ti.ab.rw.sh 11 fluoro-d-glucose.ti.ab.rw.sh 12 or/1-11
Nuclo?ide = nucleoside or nucleotide
Filtered resources appraise the quality of studies and often make recommendations for practice Unfiltered resources: Evidence is not always available via filtered resources. Searching the primary literature may be required. It is possible to use specific search strategies in MEDLINE and other databases to retrieve the best available evidence.
Sources quaternaires : Clinical guidelines/réunions de consensus/standards Sources tertiaires : Revues systématiques/méta-analyses/publication EBM Sources secondaires : Outils de recherche dans la littérature Sources primaires : Revues publiant les études scientifiques
Time coverage Since when Source How many journal indexed ; Which kind of indexation (full vs selection)? Topics Content Which publication type? Indexation Thesaurus? Abstracts Always?