One epidemiologist raised the concern that people who enjoy physical activity might purposefully choose to live in neighborhoods with a high walkability score, whereas people who don't enjoy physical activity might be indifferent about their neighborhood's walkability score. Furthermore, people who enjoy physical activity are much more likely to exercise for at least 150 minutes per week. If these concerns are true, would they cause the calculated prevalence ratio be biased? And if so, which type of systematic error would it be? a) This issue would not cuase bias. b)Yes it would be biased; misclassification c)Yes it would be biased; selection bias d)Yes it would be biased; confounding
One epidemiologist raised the concern that people who enjoy physical activity might purposefully choose to live in neighborhoods with a high walkability score, whereas people who don't enjoy physical activity might be indifferent about their neighborhood's walkability score. Furthermore, people who enjoy physical activity are much more likely to exercise for at least 150 minutes per week. If these concerns are true, would they cause the calculated prevalence ratio be biased? And if so, which type of systematic error would it be?
a) This issue would not cuase bias.
b)Yes it would be biased; misclassification
c)Yes it would be biased; selection bias
d)Yes it would be biased; confounding
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