1 / 26

NICE Joint Information day 2013 Prepared by: Jenny Harbour

NICE Joint Information day 2013 Prepared by: Jenny Harbour. Outline. “Supplementary” searching Changes to the Cochrane Library interface Searching Embase (or not?) Finding UK information And the best of the rest…. “SUPPLEMENTARY” SEARCHING. research question.

kamal-berger
Télécharger la présentation

NICE Joint Information day 2013 Prepared by: Jenny Harbour

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NICE Joint Information day 2013 Prepared by: Jenny Harbour

  2. Outline • “Supplementary” searching • Changes to the Cochrane Library interface • Searching Embase (or not?) • Finding UK information • And the best of the rest…

  3. “SUPPLEMENTARY” SEARCHING

  4. research question Do we spend too much time searching databases and not enough time on supplementary searching? • So why search multiple databases at all? • Find articles in one database not found in another • Compensates for different indexing in cross discipline topics • Identifies highly cited (and therefore key) items

  5. Diminishing returns “A more selective approach to database searching would suffice in most cases…… searching non-database sources….. does appear to be a productive way of identifying further studies” 1. Royle P, Waugh N. Literature searching for clinical and cost effectiveness studies used in health technology assessment reports carried out for the National Institute for Clinical Excellence appraisal system. Health Technol Assess. 2003;7(34):iii,ix-x,1-51.

  6. Booth study • Literature survey and empirical study • Literature examining Medline coverage & database overlap: • Medline alone found 16-100% of included references • Studies missed in Medline were often indexed but not retrieved • Results from empirical study: • 1,234 references identified from 50 systematic reviews • 85.82% indexed in Medline • Medline coverage varies between subject areas • Ifuse a very effective search strategy, Medline finds 80% or more of included studies

  7. Triple plus Google Scholar & supplementary searching 3 key databases (journal articles) Specialist sources (non-journal literature) TRIPLE PLUS If yield in Medline <80% check why and refine strategy

  8. COCHRANE LIBRARY CHANGES

  9. Shorthand and mesh • Shorthand for combining lines • Enclose ranges in { } e.g. {and #1-#4} • Cannot use NOT operator with this function • Direct keying of MeSH terms • Must be placed in [ ] e.g. [mhcholesteatoma] • Use ^ before MeSH heading to turn OFF explosion e.g. [mh ^cholesteotoma] • Qualifiers (sub-headings) must be entered in CAPITALS e.g. [mhcholesteatoma/BL,CO] • Phrases must be in quotes e.g. [mh “cholesteatoma, middle ear”]

  10. Finding errors • Finding search errors • Common errors automatically identified in red text • New search help page for guidance • “Highlight orphan lines” • Must be done AFTER you have completed search • Search Manager screen only

  11. Saved searches • Append a search • Adds saved search to end of current search • Re-usable search elements • Share a search • Recipient can run your search and save to their own Cochrane account • Send via email or copy link for document/webpage options • Get help • Available from Cochrane library homepage • Click New Search Tools icon

  12. EMBASE OR NOT?

  13. Literature on using embase • What was already known: • NICE and Cochrane recommend thesaurus terms and free-text • Approx. 80,000 trials in Embasenot indexed as RCT in Medline • Embase searches generally less precisethan Medline • FocusingEmtree terms in drug trial searches maintained ~99% sensitivity whilst reducing number retrieved by ~50%

  14. Project 1 methods • Research question: can we search Embase without using EMTREE terms? • Retrospectively analysed searches and included studies from 8 guidelines • How many included studies came exclusively from Embase? • Are ‘exclusive to Embase’ studies retrieved without EMTREE terms?

  15. Project 1 results • Of 190 included studies, 15 (7.9%) were exclusive to Embase • Searching without EMTREE terms found 7 of the 15 exclusive studies • Embase delivers small but significant unique contribution?

  16. Project 2 methods • Research question: can we be more efficient by searching fewer databases? • What this study did: • Retrospectively analysed unique results from core databases (Could searching be restricted to Medline?) • Assessed the performance of NICE IP searches (If studies are indexed in Medline, why aren’t they retrieved?)

  17. Project 2 results 92% studies indexed in Medline 93% studies indexed in Embase

  18. Project 2 results • 68% of Medline strategies retrieved 100% of included studies indexed in Medline • 24 studies indexed in core resources but not retrieved • So can we restrict searching to Medline? No • Deeper indexing in Embase useful for novel topics • Studies picked up sooner in Embase

  19. FINDING UK INFORMATION

  20. Why search uk databases? • Choosing the wrong resources can bias reviews • Rapid reviews focus on UK… • …but main databases used are American “We do not need more information but different information: information which challenges that which is commonly known or believed” • Study to explore usefulness of UK databases e.g. BNI, HEED etc • Searches on databases titles to identify evidence on databases • Interview (chats?) with information specialists

  21. ‘Interview’ comments Findability ..Problems are not UK database problems but small database problems Pubmed + UK The lack of export function drives me nuts.. Better platforms i.e. OVID

  22. AND THE BEST OF THE REST…

  23. Objective search strategies • Objectively derived search strategies • Covered in a previous workshop • Transfers methods for filter development to topic searches • Search terms identified based on frequency analysis of key references • Removes requirement for subject knowledge • 95.69% of relevant references found by traditional search identified by objective search • Difficult to apply to non-drug interventions

  24. Citation searching • Citation searching: • Comparison of citation searching in Google Scholar (GS) and Web of Science (WOS) • Of 39 included studies, 6 retrieved by GS but not WOS, 3 retrieved by WOS but not GS • All 8 high importance papers found by both GS and WOS • Study conclusions would not have been changed by using one rather than other • WOS were cheapest to administer and sift

  25. Any final questions

  26. evaluation Please can you all complete a workshop evaluation form and hand it in before you leave?

More Related