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Critical Appraisal : The Librarian’s Role

Critical Appraisal : The Librarian’s Role. Andrew Booth and Louise Falzon. What is critical appraisal?. Weighing up evidence to assess: its validity (closeness to the truth) its usefulness (clinical applicability). Sackett and Haynes, 1995 FIND  APPRAISE  ACT.

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Critical Appraisal : The Librarian’s Role

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  1. Critical Appraisal : The Librarian’s Role Andrew Booth and Louise Falzon

  2. What is critical appraisal? Weighing up evidence to assess: • its validity (closeness to the truth) • its usefulness (clinical applicability). Sackett and Haynes, 1995 FIND  APPRAISE  ACT

  3. Can librarians get involved? • Resource provider • Evidence locator • Appraiser • Digest Producer • Appraisal Tutor

  4. Some familiar roles • Resource provider • Critical appraisal tools • Critically appraised resources • Evidence locator • Search skills • Search filters • Appraiser? Digest producer?

  5. Appraisal continuum Searching filtering digests appraising teaching appraisal

  6. Why should librarians get involved? • Extends and demonstrates existing skills. • Other information sectors do it. • Area of research expertise • Value-added service • Improved profile/prestige

  7. How are we getting involved today... ...Producing an evidence digest

  8. Critically appraised resources • Systematic reviews • telling the full story • e.g. Cochrane Library, NHS CRD, NHS HTA • Guidelines • implementing the full story • SIGN, DEC, AHRQ, NIH • Digests of evidence • giving a pointer in the right direction

  9. Study based NHS CRD DARE NHS CRD NHS EED EB Journals Best Evidence Topic based ARIF Clinical Evidence Jnl of Clinical Excellence Evidence Matters Evidence-Based Digests

  10. Aims • To define a clinically relevant topic • To draw together a body of relevant evidence • To identify key messages from the best available evidence

  11. Key messages • Structured format • Indicative title • One line summaries • Levels of evidence and grades of recommendation

  12. This afternoon’s workshop • Producing a JCE style topic-based digest • Format and content • Techniques • Over to you!

  13. Format • Why important? • Relevance of topic, ‘burden of disease’ (to health service, society, individual), incidence and prevalence, key issues • What is required? • Nature of the intervention • Cost • Cost consequences of implementation

  14. Format (cont.) • Who is involved • Identification of interested parties • Evidence • Key messages • Quality • References • Of all sources consulted

  15. Techniques • Match evidence to message • Background = stats, official publications • Effectiveness = RCTs, systematic reviews • Authorise messages • Consider context • Keep wording from original source • Refer to source

  16. Techniques (cont.) • Keep it brief • Use ‘bullet points’ • Break down complex ideas • Make a start • Statements can be developed - or replaced by better statements!

  17. Over to you... Support for Breastfeeding mothers • Why important? • What is required? • Cost consequences • Interested parties • Evidence of effectiveness • References (Author, year, study type)

  18. You have to help you... • Search results • Examples of JCE digests • Facilitators • Pens, paper, overheads • Time!

  19. ResourcesforProducing Digests

  20. Matching the evidence • Background • Clinical effectiveness • Cost effectiveness

  21. Background • Official publications • Government and professional bodies • Statistics • StatBase, WHO • ‘Burden of disease’ to individual, health service and society • Cohort studies

  22. Clinical Effectiveness • Sources of systematic reviews, guidelines and digests • TRIP database • SumSearch • PubMed Clinical queries • Medline filters

  23. Cost effectiveness • NHS CRD NHS EED and HTA • INAHTA Clearing House • Health Economics research units • University of York CHE links page • Medline filter

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