Efficiënt en systematisch zoeken in bibliografische databanken

Efficiënt en systematisch

zoeken in bibliografische

databanken

Donderdag 9 Maart

VOGIN-IP lezing 2017

Medische Bibliotheek Erasmus MC

food breast cancer management

Hoeveel hits verwacht je?

0

5

100

500

1.000

5.000

20.000

1.000.000


Variaties in een database

Research onderwerp:

Vitamins and hormones within the field of clinical

dermatology


Systematic approach

(vitamins[mh] OR hormones[mh] OR vitamins[pa]

OR hormones[pa] OR vitamin*[tiab] OR

hormon*[tiab]) AND ("Clinical Study" [pt] OR

clinical medicine[mh] OR Clinical Studies as

Topic[mh] OR clinical*[tiab] ) AND

(dermatology[mh] OR dermatol*[tiab] OR skin

diseases[mh] OR skin disease*[tiab])


adl OR adls OR iadl OR iadls OR badl OR badls OR ((chronic* OR long*-

term* OR longterm*) NEAR/3 (pain*)) OR (loss NEAR/3 function*) OR

(burn NEAR/3 outcome* NEAR/6 questionnaire*) OR boq OR ((burn OR

burns) NEAR/6 health NEAR/3 scale*) OR bshs OR euroqol OR sf36 OR

sf-36 OR short-form-36 OR eq-5d OR eq-6d OR eq5d OR eq6d OR itqol

OR (physical* NEAR/3 (activ* OR perform*)) OR (independent* NEAR/3

living) OR (social* NEAR/3 participat*)):ab,ti) AND ('cohort analysis'/exp

OR 'longitudinal study'/exp OR 'retrospective study'/exp OR 'prospective

study'/exp OR 'validation study'/exp OR 'validity'/exp OR 'sensitivity and

specificity'/exp OR 'clinical article'/de OR 'observational study'/de OR

'major clinical study'/de OR 'follow up'/de OR 'epidemiological data'/de OR

'case control study'/exp OR 'cross-sectional study'/exp OR (cohort* OR

longitudinal* OR retrospectiv* OR prospectiv* OR validat* OR validit* OR

(observation* NEAR/3 stud*) OR sensitiv* OR specific* OR 'follow* up*'

OR followup* OR epidemiolog* OR 'case control*' OR 'cross-

section*'):ab,ti) NOT ([animals]/lim NOT [humans]/lim)

Medische Bibliotheek Erasmus MC 33

Wie zijn wij / wat doen wij?

Wichor Bramer | Gerdien de Jonge

Informatiespecialisten Medische Bibliotheek – Erasmus MC Rotterdam

[email protected] | @wichor | nl.linkedin.com/in/wichor

>300 systematische searches per jaar

>25 co-auteurschappen van reviews (link)

PhD: Efficiency in librarian-mediated searches for systematic reviews

https://www.ncbi.nlm.nih.gov/myncbi/browse/collection/40719280/?sort=date&direction=descending


Tijd nodig voor zoekactie systematic review

Bramer WM, Rethlefsen ML, Mast F, Kleijnen J. A pragmatic evaluation of a new method for librarian-mediated

literature searches for systematic reviews. submitted. 2017.


Wie zijn jullie?

Vakgebied (biomedisch / anders)

Zoekacties (waarvoor / hoeveel / hoe)

Databases / interfaces (pubmed / embase / ovid / ebsco /

discoverytools / google (scholar) )

Thesaurus ?


Research question exhaustive search

Systematic searching

1. Examining the research question

2. Identifying key terms

a. Thesaurus terms

b. Free text terms

3. Creating a basic search strategy

4. Optimizing the basic strategy

5. Translating the strategy between databases


The Research Question

Clear and focused

Medische Bibliotheek Erasmus MC 38

Clear and focused research question

How can gist knowledge of patients be measured

Is scopic stabilisation better than Bristow Latarjet for

treating an Anterior glenohumeral luxation with labrum

injury (no ossale disorder) in a 20 YO rugby player for

recurrent luxation or other Patient Related Outcome

Measures

Dietary intake and cardiovascular disease

TOO VAGUE

TOO SPECIFIC

TOO BROAD



Clear and focused

Which articles can answer the question?



Facilitators and barriers in preconception care

evaluation studies of preconception care

Predictive factors for oronasal fistulas in children treated for clef lip

follow up studies of children treated for clef lip



Clear and focused


Understanding the research question?


Do you need to fully understand the research

question?

What is the Cell contribution to chondroid / endochondreal / intramembranous bone formation

((('bone development'/de OR 'bone mineralization'/de OR 'bone maturation'/de OR ossification/de OR 'bone conduction'/de OR 'bone transplantation'/exp OR 'bone matrix'/exp OR 'bone growth'/exp OR 'bone remodeling'/de OR ((bone NEAR/6 (minerali* OR develop* OR format* OR synthesis* OR growth* OR graft* OR transplant* OR engineer* OR defect* OR matri* OR remodel* OR conduct* OR maturat*)) OR osteogen* OR ossificat*):ab,ti) AND (chondroid* OR transchondroid* OR enchondr* OR endochondr* OR intermembran* OR cartilagin* OR (inter NEXT/1 membran*)):ab,ti) OR 'enchondralossification'/de) AND ('cell death'/de OR 'cell survival'/de OR apoptosis/de OR 'cell differentiation'/de OR 'cell fate'/de OR 'host cell'/de OR 'cell lineage'/de OR (((cell* OR msc OR osteoblast* OR osteocyte* OR osteoclast* OR preosteoblast*) NEAR/3 (death OR senescen* OR contribut* OR differentiat* OR fate OR plasticit* OR reprogram* OR donor* OR host* OR recruit* OR surviv* OR viabilit* OR lineage*)) OR apoptosis):ab,ti)



Clear and focused


Understanding the research question?

Elements (Key Concepts):

- Watch our for Bias and Duplicates

- Which elements to use in search?


Elements : Bias

Very specific characteristics

Duration of breastfeeding and intelligence

Judgements

Poor family functioning, harsh parenting and bullying behavior


Elements : Duplicates

Pre-eclampsia AND pregnant AND women

Lichtenstein therapy AND inguinal hernias


Does eating broccoli help in the prevention of cancer

generalspecific

important

unimportant

Broccoli Cancer

Prevention

Broccoli Cancer Prevention


Identifying search terms

Thesaurus


Identifying free text words

Optimal sensitivity only by additionally searching in title / abstract:

Relevant, non-inverted terms from synonyms/ entry terms




Relevant, non-inverted terms from synonyms / entry terms

Shoulder: glenohumeral joint- humeroscapular joint-

scapulo humeral joint- scapulohumeral joint- articulatio

humeri

Relevant words / phrases from narrower terms




Relevant, non-inverted terms from synonyms / entry terms

Shoulder: glenohumeral joint- humeroscapular joint-

scapulo humeral joint- scapulohumeral joint- articulatio

humeri

Relevant words / phrases from narrower terms

Colorectal Neoplasms: Colonic cancer- Cancer of

Sigmoid- Rectum tumor- Anal Neoplasms…etc…


Creating a basic search strategy

DEMO


Creating a basic search strategy (summary)

Type code in Word

Open an element with ()

For emtree terms type ''/exp and paste term

After pasting all emtree terms, type OR ():ab,ti within that element once

for free text words

Type single word synonyms first

Type (() NEAR/3 ()) somewhere in the document to reuse

Copy (() NEAR/3 ()) into the ():ab,ti part search for phrase variants, and

add the words


Optimizing your strategy

Sort by relevance and check title / abstract and thesaurus

Add new relevant words to the search in Word

Temporarily change the syntax and check words:

Per element, keeping the rest unchanged

(thesaurus) NOT (free text)

(free text) NOT (thesaurus)

DEMO


Considerations

Explode a broad term or not?

Start exploded, when many irrelevant results appear, be

more specific

Truncate a term or not?

Truncate as much as possible, hardly noise

Phrases or proximity?

Always proximity, easier and more sensitive

How broad should proximity be?

Start with 3, increase with 3 and

evaluate newly retrieved articles


Vertalen van zoekacties tussen databases

Embase.com (Embase and Medline) -1

Thorough optimization of thesaurus terms and title / abstract terms in search strategy

Macro and edit thesaurus

Medline (Ovid incl ePub) -2

MeSH terms in PubMed / Optimization

Add extra terms Remove thesaurus

Cochrane library -3

Macro

Web-of-science -4

Macro

Scopus

Macro and edit

thesaurus

CINAHL (EBSCO)

edit

thesaurus

PsycINFO

(OvidSP)

Macro and edit

Google Scholar -5

Liliacs / Scielo / Popline /

Trials Registers / WorldCat

Basic search strategy with

AND, OR parentheses based

on basic Google terms

DEMO


Success factors

Optimization techniques

Macros for database translation

Single-line search strategies

Database choice and order

Direct feedback by researcher

Creating queries in Word

Computer literaracy

Experience (be pro active)


Effect voor de organisatie

Efficiënt en systematisch zoeken in bibliografische databanken

Science

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