Advanced Searching & Reference Management

Transcription

1 Advanced Searching & Reference Management Pawin Numthavaj M.D. Section for Clinical Epidemiology and Biostatistics Faculty of Medicine, Ramathibodi Hospital, Mahidol University Bangkok, Thailand

2 Systematic Review Process Formulate Review Question Locate/identify Study Define Inclusion & Exclusion Criteria Select Studies Risk of Bias Assessment (Quality Assessment) Extract Data Analyze and Present Results Interpret Results

3 Study Identification Process Select Database(s) to Use Develop Search Strategy Modify Search Strategy Searching Explore Results from Searching Export into Reference Manager

4 Database Journal Articles Databases MEDLINE EMBASE SCOPUS Cochrane databases DARE (Database of Abstracts of Reviews of Effects) Web of Science CINAHL PsycINFO Etc. Grey Literature Organization reports Governmental reports Conference Proceedings Dissertation & Theses Web

5 Multiple Databases MEDLINE CINAHL EMBASE

6 P AND I AND C AND O Bell Palsy Idiopathic Facial Palsy Antiviral Steroid Steroid Recovery Rate House-Brackmann Scale Sunnybrook Scale Acyclovir Valacyclovir Prednisolone Methylprednisolone Prednisolone Methylprednisolone

7 Group Your Question into Terms Terms #1 Subject Headings Text words Terms #2 Subject Headings Text words Terms #3 Subject Headings Text words Antiviral Antiviral agents Antivirus, Antiviral drug, Steroid Steroids Steroid, Prednisolone, Bell Palsy Bell Palsy Bell Palsy, Idiopathic facial paralysis,

8 Combination of Search Terms Use AND between domains (P/I/C/O) Use OR inside domains for similar terms or terms that have several synonyms

9 Query Example P I Query Number Search Query Number of Results 1 Facial nerve.mp. or exp Facial Nerve/ Paralysis.mp. or exp Paralysis/ and Facial Nerve Paraly$.mp exp Facial Paralysis/ Fac$ Paralys$.mp Idiopath$.mp (3 or 4 or 5 or 6) and Palsy.mp. or exp Palsy/ $ Pals$.mp or 9 or Antiviral Agents.mp. or exp Antiviral Agents/ Antivir$.mp Ac?clovir.mp. or exp Acyclovir/ Valac?clovir.mp and (12 or 13 or 14 or 15) limit 16 to randomized controlled trial 9

10 Subject Headings Database MEDLINE EMBASE CINAHL Cochrane Library PsycINFO SCOPUS Web of Science Subject Headings MeSH EMTREE CINAHL Headings MESH Thesaurus of Psychological Index Terms N/A N/A

11 Search Engine and Database Search Engine PubMed Ovid Scopus Database(s) MEDLINE MEDLINE, EMBASE, SCOPUS

12 Advanced PubMed Searching

13 PubMed Free search engine Comprises of MEDLINE database Maintain by US National Library of Medicine, National Institutes of Health First released in 1996 Accessed from

14 MEDLINE 1946 to present material 5,600 journals in 39 languages 2,000-4,000 references added each day Biomedicine and health

15 Frequently Used Functions in PubMed 1. MESH 2. Search Operators 3. Limits 4. Clipboard 5. Save searches 6. Advanced search 7. Citation matcher 8. Clinical Queries 9. Retrieval of full text paper

16 MESH Medical Subject Heading Tag of subject in database

17 Search Operators Truncated search term (wildcards) flavor* = flavoring + flavored + flavors synerchi* = synerchiae + synerchia Combining search terms AND OR NOT ( )

18 Limits Filter unwanted results Age: infants, adults, Article types: original studies, RCTs, Metaanalysis, Article language Human/animal Recently published

19 Clipboard Stored items for later review Max 500 items 8 hours before deleted Send to collection instead if you want to permanently stored (Need My NCBI account)

20 Saved search Save for later updates Useful when you re doing systematic review Can also automatically updates

21 Advanced Search Search in command linebased Useful for complex searches Use # for referring to previous searches Operators: AND, OR, NOT, and ()

22 Download History CSV File Open in Spreadsheet programs (Excel) For use in report of search strategy supplementary table

23 Export to EndNote

24 Export to EndNote Send To command File Choose MEDLINE In EndNote choose PubMed (NLM) Citation manager.nbib EndNote Limit 200 article maximum

25 Citation Matcher Locate an article when you know the author name / title / journal name / volume / pages or visit pubmed.gov and look for Single Citation Matcher

26 Advanced Scopus Searching

27 SCOPUS Elsevier Company 4,600 health science titles 100% MEDLINE coverage 100% EMBASE coverage Additional titles including both English and non-english Scopus umbretta

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29 Advanced Scopus Searching Exact phase/loose phase searching Field codes Wildcards Boolean Operators Proximity Operators Search History Combining Multiple Searches

30 Exact phase searching Use phase in braces { } {oral thrush} Loose/approximate phase searching Use phase in quotation marks heart attack Ignore punctuation (same as heart-attack ) Plurals included (also find articles with heart attacks ) Can use wildcards

31 Field codes Search only in specific field(s) Can be upper/lower case fieldcode(search term) Ex: TITLE-ABS-KEY( prion disease ) Search only in title, abstract, and keywords

32 Field Codes Codes ABS AUTH KEY LANGUAGE PAGEFIRST PUBYEAR TITLE TITLE-ABS-KEY TITLE-ABS-KEY-AUTH Meaning Abstract Author Keywords of article Language of article First page Publication year Title Title + Abstract + Keyword Title + Abstract + Keyword + Author

33 Wildcards? : single character in a word Paralys?s : Paralysis, Paralyses * : 0 or more characters H*matology: Hematology, Haematology, Hmatology

34 AND OR AND NOT Boolean Operators

35 Proximity Operator PRE/n precedes by number of terms W/n within number of terms pain W/15 morphine pain and morphine within 15 words behavioral PRE/3 disturbances behavioral within 3 terms preceding disturbances

36 n = Same phrase: 3, 4, 5 Same sentence: 15 Same paragraph: 50 Adjacent: 0 Can combine with wildcards ship* PRE/0 channel

37 Search History

38 Combine multiple searches Use Boolean operators (#1 AND #2) AND NOT #3

39 Saved search,