Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.
-
Upload
gillian-carter -
Category
Documents
-
view
214 -
download
2
Transcript of Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.
![Page 1: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/1.jpg)
Critical Appraisal
Library and Information ServiceSouthmead Ext 5333
Frenchay Ext 6570
![Page 2: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/2.jpg)
What is critical appraisal?
• …. process of weighing up evidence to see how useful it is in decision making
![Page 3: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/3.jpg)
Why critically appraise?
• Supports sound decision making based on best available evidence
• Helps us determine:– How rigorous a piece of research is– What the results are telling us– How relevant it is to our patient
![Page 4: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/4.jpg)
How to critically appraise?
• Many different tools
• http://www.cebm.net
• http://www.phru.nhs.uk/casp/apprais.htm
• http://www.shef.ac.uk/scharr/ir/netting
But what are the three main things we are looking for?
![Page 5: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/5.jpg)
Three R’s
• Rigour - how good is the study
• Results - what is it actually telling us
• Relevance – is it relevant to our patient
![Page 6: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/6.jpg)
Levels of Evidence
• 1a A systematic review of 2 or more randomised control trials (RCTs)
• 1b an RCT• 2a a cohort study• 2b a case control study• 2c a dramatic uncontrolled experiment• 3 Respected authorities, opinions etc• 4 …someone once told me
![Page 7: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/7.jpg)
Sources of Evidence
• Primary sources– Based on experiments and published
research
• Secondary sources– Systematic reviews– Clinical guidelines– Journals of secondary publication e.g.
Evidence Based Medicine
![Page 8: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/8.jpg)
Getting Started
• Formulate PICO question
• Search appropriate sources
• Obtain article (s)
• Read to suit you!
![Page 9: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/9.jpg)
Statistics
• If in doubt ask a statistician
• Key points to look for– 95% confidence limits used– If p <0.05 then result is statistically significant– Any anomalies discussed– All subjects accounted for even if dropped out
![Page 10: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/10.jpg)
Reading for Critical Appraisal
• Introduction– Logical and knowledgeable
• Aim/research question– Clearly stated
• Methods– Fully described
• Analysis– Appropriate statistics used, all subjects
accounted for
![Page 11: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/11.jpg)
• Conclusions– Justified and valid– Cost/benefits discussed
Can I make a clinical decision based on what I have just read?
![Page 12: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/12.jpg)
Practical Exercise
Appraise the paper given to you and be prepared to share your
comments with the group
![Page 13: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/13.jpg)
Appraising Web Sites
• Authority
• Currency
• No advertisement/sponsorship
• .org, .ac, .gov better than .co.uk/.com
![Page 14: Critical Appraisal Library and Information Service Southmead Ext 5333 Frenchay Ext 6570.](https://reader036.fdocuments.us/reader036/viewer/2022072006/56649d215503460f949f73c2/html5/thumbnails/14.jpg)
Practical Exercise
In groups comment on the webpages given and be ready to
feedback