What is the main limitation of this study? In 2009, investigators were interested in evaluating the relationship between physical activity and being overweight. Using BRFSS data, they found 100 participants in South Carolina. 69 of these participants were overweight, and the remaining 31 were not. The investigators found that 46 participants who were overweight reported low levels of physical activity. The investigators also determined that 22 participants who were not overweight reported high levels of physical activity. This type of study is expensive to carry out, and non-compliance of study participants must be dealt with in the analysis. The exposure and outcome were measured on study participants at the same time; therefore, temporality cannot be established.
What is the main limitation of this study? In 2009, investigators were interested in evaluating the relationship between physical activity and being overweight. Using BRFSS data, they found 100 participants in South Carolina. 69 of these participants were overweight, and the remaining 31 were not. The investigators found that 46 participants who were overweight reported low levels of physical activity. The investigators also determined that 22 participants who were not overweight reported high levels of physical activity. This type of study is expensive to carry out, and non-compliance of study participants must be dealt with in the analysis. The exposure and outcome were measured on study participants at the same time; therefore, temporality cannot be established.
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![QUESTION 3
What is the main limitation of this study?
In 2009, investigators were interested in evaluating the relationship between physical activity and being overweight. Using BRFSS data, they found
100 participants in South Carolina. 69 of these participants were overweight, and the remaining 31 were not. The investigators found that 46
participants who were overweight reported low levels of physical activity. The investigators also determined that 22 participants who were not
overweight reported high levels of physical activity.
This type of study is expensive to carry out, and non-compliance of study participants must be dealt with in the analysis.
The exposure and outcome were measured on study participants at the same time; therefore, temporality cannot be established.
O The unit of observation is the group, so results cannot be assumed to apply to individuals.
O The study only includes cases. There is no comparison group.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F61e79119-7899-4266-bb1b-0f80023d246a%2Fa346f3cb-3f5c-4173-9ed9-0683f9535fdd%2Flqwnucg_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION 3
What is the main limitation of this study?
In 2009, investigators were interested in evaluating the relationship between physical activity and being overweight. Using BRFSS data, they found
100 participants in South Carolina. 69 of these participants were overweight, and the remaining 31 were not. The investigators found that 46
participants who were overweight reported low levels of physical activity. The investigators also determined that 22 participants who were not
overweight reported high levels of physical activity.
This type of study is expensive to carry out, and non-compliance of study participants must be dealt with in the analysis.
The exposure and outcome were measured on study participants at the same time; therefore, temporality cannot be established.
O The unit of observation is the group, so results cannot be assumed to apply to individuals.
O The study only includes cases. There is no comparison group.
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