Efficiënt en systematisch zoeken in bibliografische databases

Efficiënt en systematisch zoeken in bibliografische

databanken

Donderdag 9 MaartVOGIN-IP lezing 2017

Medische Bibliotheek Erasmus MC

food breast cancer management

Hoeveel hits verwacht je?

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])

('thermal injury'/de OR 'heat injury'/de OR 'burn'/exp OR 'burn patient'/de OR 'burn scar'/de OR 'burn nursing'/de OR 'burn unit'/de OR (((burn OR burned ) NOT burn*-out*) OR burns OR ((thermal OR heat) NEAR/3 injur*)):ab,ti) AND ('quality of life'/exp OR 'health status'/exp OR 'general health status assessment'/exp OR 'health status indicator'/de OR 'disability'/exp OR 'work resumption'/de OR 'return to work'/de OR 'sexual function'/de OR 'daily life activity'/exp OR 'chronic pain'/exp OR 'functional disease'/de OR 'functional assessment'/de OR 'disabled person'/de OR 'physical activity'/exp OR 'physical performance'/exp OR 'independent living'/exp OR 'social participation'/de OR fitness/de OR ((qualit* NEAR/3 life*) OR hrql OR hrqol OR ((health OR functional* OR physic*) NEAR/3 (stat* OR limitation* OR outcome* OR recover* OR impair* OR result* OR fitness*)) OR disab* OR invalid* OR ((walk* OR work* OR mobilit*) NEAR/3 (difficult* OR limit*)) OR (work NEAR/3 (resum* OR return OR back)) OR ((sexual* OR disease* OR assess* OR hand OR adaptat*) NEAR/3 function*) OR (dail* NEAR/3 (life OR living) NEAR/3 activit*) OR 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 JongeInformatiespecialisten Medische Bibliotheek – Erasmus MC Rotterdam

w.bramer@erasmusmc.nl | @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

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 questionHow 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 'enchondral ossification'/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 characteristicsDuration of breastfeeding and intelligence

JudgementsPoor 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

Optimal sensitivity only by additionally searching in title / abstract: 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

Optimal sensitivity only by additionally searching in title / abstract: 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

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 thesaurusAdd 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)

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) -1Thorough optimization of thesaurus terms and title / abstract terms in search strategy

Macro and edit thesaurus

Medline (Ovid incl ePub) -2MeSH terms in PubMed / Optimization

Add extra terms Remove thesaurus

Cochrane library -3

Web-of-science -4

Scopus

Macro and edit thesaurus

CINAHL (EBSCO)

edit thesaurus

PsycINFO (OvidSP)

Macro and edit

Google Scholar -5

Liliacs / Scielo / Popline / Trials Registers / WorldCatBasic search strategy with

AND, OR parentheses based on basic Google terms

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 databases

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