SEARCH STRATEGIESSEARCH STRATEGIES THE...5 Principles of searching Use Key / Text words Use Index...
Transcript of SEARCH STRATEGIESSEARCH STRATEGIES THE...5 Principles of searching Use Key / Text words Use Index...
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SEARCH STRATEGIESSEARCH STRATEGIES
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EBM Steps…EBM Steps…
Formulating an answerable question
Converting the question into search strategy
….
Formulating an answerable question
Converting the question into search strategy
….
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Process of Finding the Evidence
Process of Finding the Evidence
Formulate a clinical question
Devise a search strategy
Identify appropriate sources
Effective use of sources
Formulate a clinical question
Devise a search strategy
Identify appropriate sources
Effective use of sources
Databases are different, familiarize your selfDatabases are different, familiarize your self
CoveredCovered
Identify the key terms which define your questionIdentify the key terms which define your question
Type of research and which database will give best answer to your question
Type of research and which database will give best answer to your question
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SOURCES: PRIMARY OR SECONDARYSOURCES: PRIMARY OR SECONDARY
No need to re-invent the wheel Secondary Sources
• Some body else did the heavy work• Searching• Critical appraisal• User’s friendly presentation
No need to re-invent the wheel Secondary Sources
• Some body else did the heavy work• Searching• Critical appraisal• User’s friendly presentation
At times you will have to look for
Primary Sources
At times you will have to look for
Primary Sources
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Principles of searching
Use Key / Text words
Use Index terms / Subject headings
Construct a search strategy
Use Boolean (AND, OR & NOT)
operators
Use Key / Text words
Use Index terms / Subject headings
Construct a search strategy
Use Boolean (AND, OR & NOT)
operators
↑ SENSITIVE↑ SENSITIVE COMPLEMENT EACH OTHER
COMPLEMENT EACH OTHER
↑ SPECIFIC↑ SPECIFIC
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KEY / TEXT WORDS
These are words or phrases that can appear in the TItle,
ABstract [TIAB] and other areas of the PubMed reference.
KEY / TEXT WORDS
These are words or phrases that can appear in the TItle,
ABstract [TIAB] and other areas of the PubMed reference.
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Medical Subjects Heading: MeSHMedical Subjects Heading: MeSH
MeSH is NLM's controlled vocabulary used for indexing articles for MEDLINE/PubMed
MeSH terminology provides a consistent way to retrieve information that may use different terminology for the same concepts
MeSH is NLM's controlled vocabulary used for indexing articles for MEDLINE/PubMed
MeSH terminology provides a consistent way to retrieve information that may use different terminology for the same concepts
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MeSH (contid)MeSH (contid)
MeSH (Medical Subject Headings) assigned by human indexers to most
references in PubMed Indexers use the most specific MeSH
that appropriately describe the contents of the article
Usually there are several MeSH given to each article
MeSH (Medical Subject Headings) assigned by human indexers to most
references in PubMed Indexers use the most specific MeSH
that appropriately describe the contents of the article
Usually there are several MeSH given to each article
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MeSH (contid)MeSH (contid)
PubMed automatically tries to find a MeSH for each term entered in a search
A MeSH search will find all the articles that have that particular Subject Heading
A search on the MeSH Anti-Bacterial Agents will find•Anti-Bacterial Agents•Antibiotics•Antitubercular•Antitreponemal
PubMed automatically tries to find a MeSH for each term entered in a search
A MeSH search will find all the articles that have that particular Subject Heading
A search on the MeSH Anti-Bacterial Agents will find•Anti-Bacterial Agents•Antibiotics•Antitubercular•Antitreponemal
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INDEXINGINDEXING
Bibliographic Databases
Prospective Studies Prospective Studies
Uremia Uremia
Mortality Mortality
Kidney Failure, Acute Kidney Failure, Acute
Renal Dialysis Renal Dialysis
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Boolean Operators Boolean Operators
Are AND, OR and NOTThey MUST be capitalized in a
search Use when searching for more
than one concept
Are AND, OR and NOTThey MUST be capitalized in a
search Use when searching for more
than one concept
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“AND” logic is used to find references to
articles that have both the terms linked by
AND
“AND” logic is used to find references to
articles that have both the terms linked by
AND
Boolean OperatorsBoolean Operators
“OR” logic finds references that have
either term linked by the OR, or both the terms.
“OR” logic finds references that have
either term linked by the OR, or both the terms.
OtitisEarache NOT
Earache NOT OtitisEarache NOT Otitis
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ExampleExample
In adult patients with osteoarthritis are COX2 inhibitors compared to traditional NSAID more effective in controlling pain?
In adult patients with osteoarthritis are COX2 inhibitors compared to traditional NSAID more effective in controlling pain?
One of your residents asked you:Should we stop prescribing traditional NSAID to patients with osteoarthritis, and shift to the selective COX2 inhibitors?
One of your residents asked you:Should we stop prescribing traditional NSAID to patients with osteoarthritis, and shift to the selective COX2 inhibitors?
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COMBINED TERMS SERACHINGCOMBINED TERMS SERACHING
MeSH TERMS SEARCHINGMeSH TERMS SEARCHING
TEXT WORDS SEARCHINGTEXT WORDS SEARCHING
POPULATIOPOPULATIONN
INTERVENTIOINTERVENTIONN
COMPARISOCOMPARISONN
OUTCOMEOUTCOME
osteoarthritisosteoarthritis NSAIDNSAID Pain controlPain controlCOX2 inhibitorsCOX2 inhibitors
POPULATIOPOPULATIONN
INTERVENTIOINTERVENTIONN
COMPARISOCOMPARISONN
OUTCOMEOUTCOME
Osteoarthritis[MeSH]Osteoarthritis[MeSH]
Antiinflammatory Agents, Non-Steroidal[MeSH]
Antiinflammatory Agents, Non-Steroidal[MeSH]
COX2-Inhibitors[MeSH]COX2-Inhibitors[MeSH]
Pain[MeSH]Pain[MeSH]
POPULATIOPOPULATIONN
INTERVENTIOINTERVENTIONN
COMPARISOCOMPARISONN
OUTCOMEOUTCOME
OsteoarthritisOR
Osteoarthritis[MeSH]
OsteoarthritisOR
Osteoarthritis[MeSH]
NSAID
ORAntiinflammatory Agents, Non-Steroidal[MeSH]
NSAID
ORAntiinflammatory Agents, Non-Steroidal[MeSH]
COX2 inhibitorsOR
COX2-Inhibitors[MeSH]
COX2 inhibitorsOR
COX2-Inhibitors[MeSH]
Pain control
ORPain[MeSH]
Pain control
ORPain[MeSH]
ANDAND ANDANDANDAND
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PubMedPubMed
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OverviewOverviewMEDLINE covers
Medicine
Nursing
Dentistry
Veterinary medicine
Health care system
Preclinical sciences
Approximately 16 million records dating back to the mid-1950's
From over 5,000 current biomedical journals
MEDLINE covers Medicine
Nursing
Dentistry
Veterinary medicine
Health care system
Preclinical sciences
Approximately 16 million records dating back to the mid-1950's
From over 5,000 current biomedical journals
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DATABASESDATABASES
SEARCH BOXSEARCH BOX
FEATURES TABSFEATURES TABS
SIDE BARSIDE BAR
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LET’S TRY ITLET’S TRY IT.Antibiotics in the treatment of earache
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.
Author(s)
Title of article
PubMed IDAbbreviated journal title…etc
RESULTS SCREENRESULTS SCREEN
The search found only 61 articles on a topic where many more would be expected
The search found only 61 articles on a topic where many more would be expected
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RESULTS SCREENRESULTS SCREEN
OPTIONS IN THE RESULTS SCREEN OPTIONS IN THE RESULTS SCREEN
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.Otitis AND antibiotics
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√√
5 years
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√√√√
√√
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MeSH SEARCHINGMeSH SEARCHING
.
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otitis
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.
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Otitis AND antibiotics
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√√
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THE CLIP BOARDTHE CLIP BOARD
√√
√√
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THE HISTORY OPTIONTHE HISTORY OPTION
United Arab Emirate
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Congenital anomalies
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#1 AND #2
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COMBINED TERMS SERACHINGCOMBINED TERMS SERACHING
OUTCOMEOUTCOMECOMPARISONCOMPARISONINTERVENTIONINTERVENTIONPOPULATIONPOPULATION
OsteoarthritisOR
Osteoarthritis[MeSH]
OsteoarthritisOR
Osteoarthritis[MeSH]
NSAID
ORAntiinflammatory Agents, Non-Steroidal[MeSH]
NSAID
ORAntiinflammatory Agents, Non-Steroidal[MeSH]
COX2 inhibitorsOR
COX2-Inhibitors[MeSH]
COX2 inhibitorsOR
COX2-Inhibitors[MeSH]
Pain control
ORPain[MeSH]
Pain control
ORPain[MeSH]
ANDAND ANDANDANDAND
In adult patients with osteoarthritis are COX2 inhibitors compared to traditional NSAID more effective in controlling pain?
In adult patients with osteoarthritis are COX2 inhibitors compared to traditional NSAID more effective in controlling pain?
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SEARCHING PubMed USING
PICO
SEARCHING PubMed USING
PICO
http://askmedline.nlm.nih.gov/ask/pico.php
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osteoarthritis
Cox2 inhibitors
pain
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PRACTICE MAKES PERFECTPRACTICE MAKES PERFECTBUT, NO BODY IS PERFECT…BUT, NO BODY IS PERFECT…
SO WHY PRACTICE ?SO WHY PRACTICE ?