Medical Information Literature Search : PubMed

Bordin Sapsomboon 20 Aug 2018 http://www.si.mahidol.ac.th/simi bordin.sap@mahidol.ac.th

Objectives

Know Medical informatics

Literature search : PubMed

PICO Approach

Do Searching : PubMed

Keywords formation

Advanced level : MeSH, PICO

Evaluation 2

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Why Search for Medical Information ?

5 Roles (Medical Informatics)

Life-long learner Clinician Researcher Teacher/Communicator Manager

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Human and Information

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Skeptic

6 นาฬาคร http://bit.ly/Y2HtVJ ชางตกมน http://bit.ly/ewUepY

Skeptic

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Searching : Detective

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Google: Doctor’s Handbook !

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Information : Certainty

Belief

Opinion

Fact & Knowledge

Truth

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Speak Google’s Language

Latest mobile phones

Models of 2018

I don’t want Samsung Phones

Brain cancer vs “Brain cancer”

Mobile Phone AND Brain Cancer

site:harvard.edu

Image search

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คนหา

รปและชอพลบพลา รพ.ศรราช (Eng) ขนาดแบตเตอรทนาขนเครองบนได วนออกตรวจอ.รงนรนดร รพ.ศรราช ขาวทมดชนนาตาลตา (Low GI) รานอาหารอสานแถวปนเกลา เสนทางจากศรราชไปไบเทค ตวเครองบนราคาถก

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Advanced Search (1)

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Advanced Search (2)

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Image Search : Tools

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Search by Images

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Rt. Mouse Click over Image

Image Search : Camera

Mobile phone https://reverse.photos/

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What is Information ?

Information vs Medical Information

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Information Source

Document Journal article

Research paper

Newspaper

Magazine

E-document Web : Google

E-Journal : Publisher

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Databases

Internet Database Newspaper

Public database

Literature Database PubMed Ovid

OCLC

Science Direct

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Siriraj Medical Library Databases

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Literature 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

Relevancy Broad v.s. Specific

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 Filter - Limit

Medical Subject Headings

(MeSH)

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Strategies : Broaden

Synonym AIDS, HIV

Thesaurus Infant, Toddler

Boolean operator Pepsi OR Coke

Heading automobile

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Strategies : Narrow

More keywords Red blood cell diseases

Boolean operator AIDS AND Thailand

Thalassemia NOT THAILAND

Heading radiotherapy (only)

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Relevancy

Find “SARS and Cause”

“AIDS in Children”

“Lung cancer and radiotherapy”

“Mobile phone in 2017”

“All articles about lung cancer”

“All articles by Dr. Robinson”

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Strategies : Relevancy

Broaden and Narrow-down

Database tools Limits : AIDS in English language

Query language

MeSH

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Database Query

Find “lung cancer”

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

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MeSH

Medical Subject Headings

Heading Diseases

Subheading 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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Clinical Questions

Background question General question

Ans: Overview, Review, EMB, standards, therapy

Foreground question Complex / patient-centered question

Approach: PICO

(formulating clinical queries)

PICO

Patient / Problem

Diagnosis

Intervention

Diagnostic test

Comparison / Control

Outcomes / Effects

Prognosis

Methodology

Prevention / therapy

PICO : Example (1)

There is a section of town which has a high prevalence rate of obesity and diabetes. There are many churches in that area so you decide to work with the churches to develop a series of interventions to reduce both obesity and diabetes. One of the programs will target foods served at church-sponsored events which are mostly pot-luck.

https://sph.uth.edu/charting/handouts/ebph_handouts/pico.pdf

PICO : Example (2)

Population: members of a group of churches in an area of town

Intervention: program designed to improve types of foods served at church-sponsored events

Comparison: foods served before the intervention

Outcome: Are more nutritious foods served at church-sponsored events after the intervention?

Found Documents Relevant Documents

Relevant Found

Document Space

Existing Documents Search Strategy

Word

Keywords

Operator

MeSH

Multiple resources

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Relevant Documents

Matching Perfect

Partial

Scoring / Ranking 100% = “Perfect” matching

Calculation Frequency of the search word

appeared in the document

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SARS

SARS SARS

Bird Flu

Document Space

Relevant Documents 47

Relevant Information Source

Use relevant information source!

Medical information MEDLINE database

www.pubmed.org

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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Exercise : Find

Bird Flu

Coronavirus

Etiology / Cause

Mobile phone

Brain tumor

Risk

Shoulder dislocation

Joint instability

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