unit 7 additional questions

unit 7 additional questions - Unit 7 Fall 2010 Questions

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Click to edit Master subtitle style Unit 7 Fall 2010 Questions
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n Definition of bias n Common types of biases n Selection bias in cohort and case-control studies n Observational/information biases: surveillance,  recall, interviewer, item non-response n Most important biases in cohort studies n Most important biases in case-control/cross- sectional studies n Biases in analytic phases of a study n Misclassification: Differential and non-differential  and their effects on the RR/OR n Ways to avoid bias Study guide – Unit 7
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Chance is random error http://www.dorak.info/epi/bc.html 
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Errors of chance will cancel each other out when N is increased n Errors in chance lead to imprecise results
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Bias is systematic error http://www.dorak.info/epi/bc.html 
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Errors of bias can not be eliminated by sample size n Errors of bias lead to inaccurate (wrong) results n It is the investigator’s responsibility  to minimize  or eliminate errors of bias in the: Design Implementation Data collection Data cleaning Data analysis Manuscript preparation and submission
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Which types of biases are not the responsibility of the investigator? n Misclassification bias n Recall bias n Selection bias n Unknown confounding bias
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Bias is often defined as any systematic error that occurs in a study and alters This systematic error may occur… n A. In the design phase of the study n B. In the conduct of the study n C.In the analysis of the study n D.All of the above
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Define Selection Bias n Type your answer here
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unit 7 additional questions - Unit 7 Fall 2010 Questions

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