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EPI 5240: Introduction to Epidemiology Screening and diagnostic test evaluation November 2, 2009

EPI 5240: Introduction to Epidemiology Screening and diagnostic test evaluation November 2, 2009. Dr. N. Birkett, Department of Epidemiology & Community Medicine, University of Ottawa. Session Overview. Review key features of tests for disease. Diagnostic test evaluation Study designs

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998 views • 65 slides

Likelihood ratios

Likelihood ratios. Why these are the most thrilling statistics in Emergency Medicine. Objectives. Explore how we make diagnoses 2x2 tables, sensitivity and specificity Snout and Spin pre/post test probabilities and LRs. Revision of terms. Prevalence Sensitivity Specificity Truth table.

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414 views • 30 slides

Diagnosis

Diagnosis. Concepts and Glossary. Cross-sectional study. The observation of a defined population at a single point in time or time interval. Exposure and outcome are determined simultaneously. Sensitivity. Proportion of people with the target disorder who have a positive test.

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353 views • 16 slides

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Post test odds - PowerPoint PPT Presentation

EPI 5240: Introduction to Epidemiology Screening and diagnostic test evaluation November 2, 2009

Likelihood ratios

Diagnosis