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In a study where the outcome is misclassified in equal amounts for the exposed and non-exposed, the following will result: a) The estimate will not be biased b) The estimate will be biased toward the null c) The estimate will be biased away from the null

In a study where the outcome is misclassified in equal amounts for the exposed and non-exposed, the following will result: a) The estimate will not be biased b) The estimate will be biased toward the null c) The estimate will be biased away from the null

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Practice Questions: In a study where the outcome is misclassified in equal amounts for the exposed and non-exposed, the following will result: a) The estimate will not be biased b) The estimate will be biased toward the null c) The estimate will be biased away from the null d) The estimate will be biased in either direction Cohort studies are more efficient than case-control studies for identifying the causes of a rare disease. a) True b) False In case-control studies, we select participants on the basis of their exposure status; in cohort studies, we select participants on the basis of their disease status. a) True b) False You are investigating the role of physical activity in heart disease in a cohort study, and your data suggests a protective effect. While presenting your findings, a colleague asks whether you have thought about confounders, such as factor X. Under which one of the following conditions could factor X confound the association between physical activity and heart disease? a) Factor X prevented randomization. b) Factor X is associated with physical activity and also with heart disease. c) Factor X is on the causal pathway between physical activity and heart disease d) Factor X is a risk factor for some other disease, but not heart disease. What is an intention-to-treat analysis and why is it conducted? List four methods used to control for confounding
Transcribed Image Text:Practice Questions: In a study where the outcome is misclassified in equal amounts for the exposed and non-exposed, the following will result: a) The estimate will not be biased b) The estimate will be biased toward the null c) The estimate will be biased away from the null d) The estimate will be biased in either direction Cohort studies are more efficient than case-control studies for identifying the causes of a rare disease. a) True b) False In case-control studies, we select participants on the basis of their exposure status; in cohort studies, we select participants on the basis of their disease status. a) True b) False You are investigating the role of physical activity in heart disease in a cohort study, and your data suggests a protective effect. While presenting your findings, a colleague asks whether you have thought about confounders, such as factor X. Under which one of the following conditions could factor X confound the association between physical activity and heart disease? a) Factor X prevented randomization. b) Factor X is associated with physical activity and also with heart disease. c) Factor X is on the causal pathway between physical activity and heart disease d) Factor X is a risk factor for some other disease, but not heart disease. What is an intention-to-treat analysis and why is it conducted? List four methods used to control for confounding
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