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Last Updated: Aug 31, 2017 URL: http://guides.lsuhsc.edu/physicianassistants Print Guide RSS Updates

PYAS 6551- Research Assignment-Critical Appraisal Tools Print Page
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Analysis Resources


Clinical Epidemiology: The Essentials
Funding for this book is provided by TRIP, LSU Health Shreveport’s Quality Enhancement Plan



 

Understanding Research Designs

 

EBM Pyramid

 

Searching for Study Type

Identify the question type in order to identify the best type of study to answer the clinical question.  This will assist in searching PubMed to find the most specific information.

 

Question Type

Study Design

Search To Use

Therapy:  how to select treatments that do more good than harm

RCT>cohort > case control > case series

sensitive/broad   99%/70%

http://1.usa.gov/1FEwtjO

 specific/narrow   93%/97%

http://1.usa.gov/1LLr7W1

Diagnosis and screening:  how to select and interpret tests

Prospective, blind comparison to gold standard

sensitive/broad   98%/74%

http://1.usa.gov/1RpuwNr

specific/narrow   64%/98%

http://1.usa.gov/1AznelY

Etiology:  what factors led to the development of an illness or condition

RCT>cohort > case control > case series

sensitive/broad   93%/63%

http://1.usa.gov/1Aznlhl

specific/narrow   51%/95%

http://1.usa.gov/1LKBpFi

Prognosis:  how to anticipate the patient’s likely course

Cohort > case control > case series

sensitive/broad   90%/80%

http://1.usa.gov/1Rpv5XG

specific/narrow   52%/94%

http://1.usa.gov/1FhMXMl

 

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