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Efficiënt en systematisch zoeken in bibliografische databanken

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Workshop door Wichor Bramer bij VOGIN-IP-lezing 2017, Amsterdam, 9 maart

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Efficiënt en systematisch zoeken in bibliografische databanken

  1. 1. Efficiënt en systematisch zoeken in bibliografische databanken Donderdag 9 Maart VOGIN-IP lezing 2017
  2. 2. 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
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  11. 11. Medische Bibliotheek Erasmus MC Variaties in een database Research onderwerp: Vitamins and hormones within the field of clinical dermatology
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  28. 28. Medische Bibliotheek Erasmus MC 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])
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  31. 31. Medische Bibliotheek Erasmus MC 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)
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  33. 33. Medische Bibliotheek Erasmus MC 33 Wie zijn wij / wat doen wij? Wichor Bramer | Gerdien de Jonge Informatiespecialisten 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
  34. 34. Medische Bibliotheek Erasmus MC 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.
  35. 35. Medische Bibliotheek Erasmus MC Wie zijn jullie? Vakgebied (biomedisch / anders) Zoekacties (waarvoor / hoeveel / hoe) Databases / interfaces (pubmed / embase / ovid / ebsco / discoverytools / google (scholar) ) Thesaurus ?
  36. 36. Medische Bibliotheek Erasmus MC 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
  37. 37. Medische Bibliotheek Erasmus MC The Research Question Clear and focused
  38. 38. 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
  39. 39. Medische Bibliotheek Erasmus MC The Research Question Clear and focused Which articles can answer the question?
  40. 40. Medische Bibliotheek Erasmus MC 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
  41. 41. Medische Bibliotheek Erasmus MC The Research Question Clear and focused Which articles can answer the question? Understanding the research question?
  42. 42. Medische Bibliotheek Erasmus MC 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)
  43. 43. Medische Bibliotheek Erasmus MC The Research Question Clear and focused Which articles can answer the question? Understanding the research question? Elements (Key Concepts): - Watch our for Bias and Duplicates - Which elements to use in search?
  44. 44. Medische Bibliotheek Erasmus MC Elements : Bias Very specific characteristics Duration of breastfeeding and intelligence Judgements Poor family functioning, harsh parenting and bullying behavior
  45. 45. Medische Bibliotheek Erasmus MC Elements : Duplicates Pre-eclampsia AND pregnant AND women Lichtenstein therapy AND inguinal hernias
  46. 46. Medische Bibliotheek Erasmus MC Does eating broccoli help in the prevention of cancer generalspecific important unimportant Broccoli Cancer Prevention Broccoli CancerPrevention
  47. 47. Medische Bibliotheek Erasmus MC Identifying search terms Thesaurus
  48. 48. Medische Bibliotheek Erasmus MC Identifying free text words Optimal sensitivity only by additionally searching in title / abstract:  Relevant, non-inverted terms from synonyms/ entry terms
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  51. 51. Medische Bibliotheek Erasmus MC Identifying free text words 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
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  53. 53. Medische Bibliotheek Erasmus MC Identifying free text words 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…
  54. 54. Medische Bibliotheek Erasmus MC Creating a basic search strategy DEMO
  55. 55. Medische Bibliotheek Erasmus MC 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
  56. 56. Medische Bibliotheek Erasmus MC 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
  57. 57. Medische Bibliotheek Erasmus MC 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
  58. 58. Medische Bibliotheek Erasmus MC 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
  59. 59. Medische Bibliotheek Erasmus MC 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)
  60. 60. Medische Bibliotheek Erasmus MC Effect voor de organisatie

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