Literature SearchLiterature SearchPubMed & ERIC

Bordin Sapsomboon26 February 2014

http://www.si.mahidol.ac.th/simibordin.sap@mahidol.ac.th

Objectives Know

Information seeking Literature search : PubMed, ERIC

Do Searching : PubMed, ERIC Searching : PubMed, ERIC Keywords formation Advanced level : MeSH Advanced level : MeSH

Evaluation

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Why Search for Medical Information ?

5 Roles (Medical Informatics)

Life-long learner Clinician Researcher Teacher/Communicator ManagerManager

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Skeptic

5นาฬาคริี http://bit.ly/Y2HtVJช้างตกมนั http://bit.ly/ewUepY

Human and Information

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Skeptic

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SSearching : Detective

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Google: Doctor’s Handbook !

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Information : Certainty Belief Opinion Fact & Knowledgeg Truth

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What is Information ? Information vs Medical Information

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Information Source Document

Journal article Research paper Newspaper Magazine g

E-document Web page : HTML document Web page : HTML document E-journal : PDF document

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Databases

Internet Database Newspaper Public database

Literature Database PubMed PubMed Ovid OCLC OCLC Science Direct

ERIC ERIC16

Siriraj Medical LibrarySiriraj Medical LibraryDatabases

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PubMed.Org

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ERIC.ED.GOV

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SLiterature Search

Text matching Word or Words

All documents contains the word “SARS” any where

Keywords Synonyms

All documents about “SARS”

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Strategies for Literature Search

Number of Items Found Too many v.s. Too few

Relevancyy Broad v.s. Specific Relevant v.s. Irrelevant Relevant v.s. Irrelevant

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Search Tools

Boolean operators AND, OR, NOT, ( )

Fields in article / database Title, Abstract, Author, UI number

MEDLINE database MEDLINE database Filter - Limit Medical Subject Headings Medical Subject Headings

(MeSH)

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Strategies : Broaden

Synonym AIDS, HIV

Thesaurus Infant, Toddler

Boolean operator Boolean operator Pepsi OR Coke

H di Heading automobile

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Strategies : Narrow

More keywords Red blood cell diseases

Boolean operatorp AIDS AND Thailand Thalassemia NOT THAILAND Thalassemia NOT THAILAND

Heading radiotherapy (only) radiotherapy (only)

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Relevancy Find

“SARS and Cause” “AIDS in Children” “Lung cancer and radiotherapy” “Mobile phone in 2007” p “All articles about lung cancer” “All articles by Dr Robinson” All articles by Dr. Robinson

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Strategies : Relevancy

Broaden and Narrow-down Database tools

Limits : AIDS in English languageg g g Query language MeSH MeSH

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Database Query Find “lung cancer”

"lung neoplasms"[MeSH Terms] g p [ ]OR lung cancer[Text Word]

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MeSH Medical Subject Headings Heading

Diseases Subheading

Virus Diseases Virus Diseases

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MeSH : Example Virus Diseases

RNA Virus Infections Nidovirales Infections

• Coronaviridae Infections– Coronavirus Infections

[C02.782.600.550.200]

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Word

Existing Documents Search Strategy Keywords

Operator

RelevantFound

MeSH

Multiple Foundresources

Document Space

Found DocumentsRelevant Documents Found DocumentsRelevant Documents33

Relevant Documents Matching

Perfect Partial

Scoring / Ranking 100% = “Perfect” matching 100% Perfect matching Calculation

Frequency of the search wordFrequency of the search word appeared in the document

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Bird

SARS

BirdFlu

SARSSARS

Document Spacep

lRelevant Documents35

Relevant Information Source

Use relevant information source!

Medical information MEDLINE database www pubmed org www.pubmed.org

G l i f ti General information Start with good search engines ?

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Relevant Documents Perfect “matching”

Matching to your NEEDS Not perfect TEXT matching

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Find Sars Coronavirus Etiology / Causegy Mobile phone Brain tumor Brain tumor Risk Shoulder dislocation Joint instabilityy

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