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1 Medical Literature as a Resource for Evidence-Based Medicine. An Overview. Jarmila Potomková potomkov@tunw.upol.cz Palacky University Medical Library Vladimír Mihál mihalv@fnol.cz Professor of Pediatrics & Vice-Dean Palacky University Faculty of Medicine
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2 Winter Semester List of Topics 1. Medical literature as a resource for evidence based medicine. An overview. 2. Biomedical literature resources and hierarchy of evidence. 3. MEDLINE - the most important biomedical database. PubMed online training. 4. MEDLINE - sample searches. Search strategy tips, Boolean operators, working with search results. MeSH, links to fulltext articles.
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3 Topic 1: AGENDA 1A: Searching for „evidence“ What is evidence-based medicine? 1B: Clinical questions Background vs. Foreground questions 1C: Searching tips: Books Search engines Google www.google.com (various doucments)www.google.com Scholar Google www.scholar.google.com (journal articles)www.scholar.google.com Scirus www.scirus.com (various SCIENTIFIC documents)www.scirus.com Databases MEDLINE (journal articles bibliographic records)
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4 1A: Searching for „evidence“ What is evidence-based medicine?
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5 EBM : Definition Tutorial for self-study http://www.hsl.unc.edu/services/tutorials/e bm/welcome.htm Decision-making process in healthcare Clinical expertise (=education + cumulated experience + clinical skills) Patient values (=personal + unique concerns, expectations, responsibility for own health etc.) Best (external) evidence (clinically relevant published research + sound methodology).
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6 EBM : Lifelong Process The practice of evidence-based medicine is a process of lifelong, self-directed, problem-based learning; Caring for patients creates the need for clinically important information about Diagnosis Prognosis Therapy and other clinical and health care issues.
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7 EBM: Role of Literature Evidence-based medicine "converts reading and appraising the biomedical literature into the pragmatic process of using the literature to benefit individual patients, while simultaneously expanding the clinician's knowledge base." Bordley DR. Evidence-based medicine: a powerful educational tool for clerkship education. American Journal of Medicine 1997;102(5):427-32.
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8 EBM: Why? The total sum of medical information doubles in approximately 3.5 years It has been estimated that from 1948 through 1994, the total sum of health-care knowledge increased 1,342 times. „Health interventions – eg. treatment (medical, surgical, pharmaceutical, etc.) must be designed to provide benefit to a patient.“ Kirkwood B, Making public health interventions more evidence based. BMJ 2004;328:966-967.
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9 1B: Clinical Questions Two „Layers“ Background & Foreground Questions
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10 Clinical Question for Today A role of vaccination to prevent [recurrent] otitis media in children. Author: Prof. V. Mihál, MD, PhD. PU Medical Faculty Vice-Dean, Head of Pediatric Department
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11 Two „Layers“ of Clinical Questions Background (General) Questions „Background" questions ask for general knowledge about a disease or disease process 2 essential components: A question root (who, what, when, etc.) A disorder, test, treatment, or other aspect of healthcare Example: What is otitis media ? What is it caused by? What are typical symptoms? Which body organ is affected? Which population is most frequently affected and when? Need for basic information, Not to make a clinical decision about a specific disorder.
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12 Foreground (Specific) Questions „Foreground" questions ask for specific knowledge about managing patients with a disease. 3 or 4 essential components Patient and/or problem Intervention (diagnosis, treatment…..) Comparative intervention (optional, include if relevant) Clinical outcome (cured disease, relief, alleviation, prognosis……) Example: In young children with recurrent of acute otitis media (AOM), should doctors recommend vaccination to reduce frequency of AOM episodes?
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13 Foreground Questions Structure Patient and/or problem Children (young)/recurrent acute otitis media Intervention Drug therapy: analgesics, antibotics Comparative intervention Drug therapy + vaccination Clinical outcome Prevention, reduction of AOM episodes
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14 1C: Searching Tips Books Search engines Google www.google.com (mixed documents ) www.google.com Scholar Google www.scholar.google.comwww.scholar.google.com (journal articles) Scirus www.scirus.com (various SCIENTIFIC documents)www.scirus.com
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15 Searching Tips: Books Online library catalogs Example: [ US] National Library of Medicine LocatorPlus www.locatorplus.gov Online medical textbooks (some free) Example: The Merck Manuals: Merck Manual of Diagnosis & Therapy Merck Manual – Home Edition. „ A trusted source for medical information available free online “ eMedicineHealth : Dictionary www.merckmanual.com Google Book Search http://books.google.com
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16 LocatorPlus Advanced Menu Search
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17 LocatorPlus Search Results
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18 LocatorPlus Search Results Holdings View Detailed View
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19 LocatorPlus Advanced Menu Search „AND“ Search
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20 Searching Tips: Books Online library catalogs Example: [ US] National Library of Medicine LocatorPlus www.locatorplus.gov Online medical textbooks (some free) Example: The Merck Manuals: Merck Manual of Diagnosis & Therapy Merck Manual – Home Edition. „ A trusted source for medical information available free online “ www.merckmanual.com eMedicineHealth : Medical Dictionary www.emedicinehealth.com Google Book Search http://books.google.com
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21 Merck Manual of Diagnosis and Therapy : Otitis media Search
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22 Merck Manual – Home Edition Consumer Information Simple descriptions for laypeople + medical school beginners Pronunciations of some medical terms.
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23 Searching Tips: Books Online library catalogs Example: [ US] National Library of Medicine LocatorPlus www.locatorplus.gov Online medical textbooks (some free) Example: The Merck Manuals: Merck Manual of Diagnosis & Therapy Merck Manual – Home Edition. „ A trusted source for medical information available free online “ www.merckmanual.com Google Book Search http://books.google.com
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24 Google Book Search Advanced Title Search
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25 Advanced Book Search Title Search Results
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26 Google Book Search Advanced Text Search
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27 Text Search Results 742 books on ……..date ………
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28 1C: Searching Tips Books Search engines Google www.google.com (mixed documents ) www.google.com Scholar Google www.scholar.google.com (journal articles)www.scholar.google.com Scirus www.scirus.com (various SCIENTIFIC documents)www.scirus.com
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31 Self-study Assignment 1 Identify types of first 40 documents, eg. Company websites Journal articles Fulltext version Bibliographic record only Bibliographic record + abstract Database Educational material (universities, professional societies) Patents Patient information Library catalogs Business information (eg.pharmaceutical companies) Others (specify)
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32 Self-study Assignment 1 Notes
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33 References Bordley DR. Evidence-based medicine: a powerful educational tool for clerkship education. American Journal of Medicine 1997; 102(5):427-32. Kirkwood B, Making public health interventions more evidence based. British Medical Journal 2004;328:966-967.
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34 Study Materials http://knihovna.upol.cz/lf
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