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Chapter 6 Review

by: Lauren Hawley

Chapter 6 Review HLTH 2020

Lauren Hawley

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About this Document

These notes help differentiate between the different types of bias in the health system.
Introduction to Public Health - HLTH 2020 - 005
Ralph Welsh
Class Notes
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This 1 page Class Notes was uploaded by Lauren Hawley on Saturday July 30, 2016. The Class Notes belongs to HLTH 2020 at Clemson University taught by Ralph Welsh in Spring 2016. Since its upload, it has received 12 views. For similar materials see Introduction to Public Health - HLTH 2020 - 005 in Public Health at Clemson University.


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Date Created: 07/30/16
PH Chapter 6 Sources of Error EPIDEMIOLOGY CANNOT PROVE CAUSE AND EFFECT Random Variation  Association is merely due to chance Confounding Variables  Factors that are associated with the exposure and that may independently affect the risk of developing the disease. Bias (Systematic Error)  Selection Bias: problem in choosing subjects for a case-control study o May also occur when there is a systematic difference between people who choose or are chosen to participate in a study and those who do not. Cause and Effect 1. Study with a large number of subjects is more likely to yield a valid result than a small one 2. The stronger the association measured between exposure and disease, the higher the relative risk or odds ration, the more likely that there is a true cause and effect. 3. A dose-response relationship between exposure and risk of disease is evidence-supporting exposure as a cause of the disease.


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