Literature Search - Overview

Literature SearchSomkiat Asawaphureekorn

M.D., M.Sc. (Clinical Epidemiology)

1Wednesday, August 24, 2011

Department of Ophthalmology, Faculty of Medicine, Srinagarind Hospital

Khon Kaen University, Khon Kaen, Thailand.


Before You Search


Before You Search

• Know your resources

• Form your questions, search terms

• Form your search strategy

• Search syntax

• Record your search strategy & results

• Try all relevant databases

• Refine your search as required

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Before You Search


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Before You SearchYour Question


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Before You SearchYour Question PICO


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Before You Search

Background Question?

Your Question PICO


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Before You Search

Background Question? Text bookYes

Your Question PICO


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Before You Search


Question Type

No

Your Question PICO


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Before You Search


Question Type

No

Your Question

TherapyEtiology

DiagnosisPrognosis

etc.

PICO


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Before You Search


Question Type

No

Your Question

Study Design

TherapyEtiology

DiagnosisPrognosis

etc.

PICO


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Before You Search


Question Type

No

Your Question

Study Design

TherapyEtiology

DiagnosisPrognosis

etc.

RCTSystematic Review

Cohortetc.

PICO


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Before You Search


Identify the best available resource

Text bookYes

Question Type

No

Your Question

Study Design

TherapyEtiology

DiagnosisPrognosis

etc.


Cohortetc.

PICO


Search the database5

Before You Search


Identify the best available resource

Text bookYes

Question Type

No

Your Question

Study Design

TherapyEtiology

DiagnosisPrognosis

etc.


Cohortetc.

PICO


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General Search Strategy


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Define relevant, searchable terms



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General Search StrategyMeSH

EmTreeFree text


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Define alternate terms

MeSHEmTreeFree text


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Design search strategy

MeSHEmTreeFree text


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MeSHEmTreeFree text

AND OR

NOT


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Relevant results?

MeSHEmTreeFree text

AND OR

NOT


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Relevant results?

No

MeSHEmTreeFree text

AND OR

NOT


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Relevant results?

Summarize & Appraise the evidence

Yes

No

MeSHEmTreeFree text

AND OR

NOT


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Relevant results?

Apply the evidence

GOODSummarize & Appraise the evidence

Yes

No

MeSHEmTreeFree text

AND OR

NOT


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Relevant results?

Apply the evidence

GOODSummarize & Appraise the evidence

Yes

No

Poor

MeSHEmTreeFree text

AND OR

NOT


Bibliographic Databases

• PubMedhttp://pubmed.gov

• Scopus (SciVerse)http://www.scopus.com

• ISI Web of Science (Science Citation Index)http://isiknowledge.com

• LILACS (via “virtual health library”)http://regional.bvsalud.org

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Searching Systematic Reviews

• Cochrane reviews http://thecochranelibrary.org Search Cochrane reviews via PubMed

• AND cochrane database syst rev [journal]• AND (systematic [sb] OR meta-analysis [pt])• Caution when using “Limit” boxes in “Advance search”

• Non-Cochrane reviews (with comments) CRD databases (Centre for Reviews and Dissemination @ NHS)

http://www.crd.york.ac.uk

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Searching Ref. of the Ref.

• Scopus

• Science Citation Index

• Google Scholarhttp://scholar.google.com

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Free Academic Databases

• Google Scholarhttp://scholar.google.com

• Scirushttp://www.scirus.com

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Open Access Journals• Directory of open access journals

www.doaj.org

• Open access publishers BioMed Central

• www.biomedcentral.com PLoS - Public Library of Science

• www.plos.org Dove Medical Press

• www.dovepress.com Hindawi Publishing Corporation

• www.hindawi.com Medknow Publications

• www.medknow.com11


http://www.bmc.com

http://www.bmc.com

http://www.plos.org

http://www.plos.org

www.doaj.org


Open Access Publishers 1

• BioMed Central www.biomedcentral.com Year founded 2000 Based in U.K. An STM (Science, Technology and Medicine)

publisher Journals 219

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• PLoS - Public Library of Science www.plos.org Year founded 2000 Based in San Francisco, U.S.A. Journals

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• Dove Medical Press www.dovepress.com Year founded 2003 Based in U.K. Journals 114

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• Hindawi Publishing Corporation www.hindawi.com Year founded 1997 Based in Cairo, Egypt Journals >300

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• Medknow Publications www.medknow.com Year founded 1999 Based in Mumbi, India Journals >135

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PubMed Central

• PubMed free full-text archives

• Freely access with copyright protection

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Clinical Trials Database

• Cochrane Librarythecochranelibrary.org Include hand-search clinical trials

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Clinical Trials Registration• ClinicalTrials.gov (NCT12345678)

http://www.clinicaltrials.gov U.S. NIH, developed by NLM

• Current Controlled Trials (ISRCTN12345678) http://www.controlled-trials.com NHS, U.K., published by BioMed Central

• International Clinical Trials Registry Platform (WHO ICTRP) Search Portal http://www.who.int/ictrp/en/

• Thai Clinical Trials Registry (TCTR-1234-56789) http://www.clinicaltrials.in.th

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http://www.clinicaltrials.gov


NCT

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http://www.controlled-trials.com


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http://www.clinicaltrials.in.th


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Clinical Trials Search Portal• International Clinical Trials Registry Platform

(WHO ICTRP) Search Portal A search tool, not a registration site Search across multiple clinical trials registration

• ClinicalTrials.gov• Current controlled trials• Australian New Zealand Clinical Trials Registry• Brazilian, Chinese, Indian, Korean, Cuban, German,

Iranian, Japanese, Sri Lanka, Pan African, the Nethelands http://www.who.int/ictrp/en/ http://apps.who.int/trialsearch/

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http://www.who.int/ictrp/en/


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Thai Journals Databases

• Thai Index Medicus @ Chulahttp://library.md.chula.ac.th

• Thai Medical Index @ Sirirajhttp://www.medlib.si.mahidol.ac.th

• Thai-Journal Citation Index Centre (TCI)http://http://www.kmutt.ac.th/jif/public_html/

• Thai Theses Databasehttp://thesis.stks.or.th

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Search Exhaustively

• Electronic databases

• Printed journals, hand-search

• Unpublished articles

• Expert seeking

• Pharmaceutical companies data

• Grey literature (non-peer reviewed items)

• General web search engines google, yahoo, etc.


Other Special Databases


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Special Databases

• CINAHL (Cumulative Index of Nursing literature and Allied HeaLth)

http://www.cinahl.com

• PsycINFO http://www.apa.org/psycinfo/ APA, only Psychological abstracts (from 1800s)

• CTSNet (The Cardiothoracic Surgery Network) http://www.ctsnet.org/

• PEDro (Physiotherapy Evidence Database) http://www.pedro.org.au/


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Drugs & Chemical Databases

• TOXNET http://toxnet.nlm.nih.gov/ (can access via PubMed) Toxicology, hazardous chemicals, environmental

health, and toxic releases

• Micromedex www.micromedex.com A drug information system One of the most authoritative resource From Thomson


http://toxnet.nlm.nih.gov

http://toxnet.nlm.nih.gov

http://www.micromedex.com

http://www.micromedex.com

Thesis Search

• NDLTD www.ndltd.org The Networked Digital Library of Theses and

Dissertations An international organization dedicated to promoting

the adoption, creation, use, dissemination and preservation of electronic analogues to the traditional paper-based theses and dissertations

Open access with PDF files

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Full text Databases• PubMed Central

www.pubmedcentral.nih.gov

• HighWire Presshighwire.stanford.edu

• Free Medical Journalswww.freemedicaljournals.com

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http://highwire.stanford.edu

http://highwire.stanford.edu

Reference Management Tool

• Zotero: http://www.zotero.org

• Need to run under Firefox (Firefox add-on)

• Produced by Center for History and New Media at George Mason

University

• Funded by United States Institute of Museum and Library

Services Andrew W. Mellon Foundation Alfred P. Sloan Foundation

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Knowledge & Wisdom


Knowledge & Wisdom

Knowledge …is proud that he has learnt so much,


Knowledge & Wisdom


Wisdom …is humble that he knows no more.


Knowledge & Wisdom



The Task (1785) by


Knowledge & Wisdom



The Task (1785) byWilliam Cowper (1731 - 1800)


THANK YOU


Literature Search - Overview

Education

Transcript of Literature Search - Overview