10 Questions
What is a potential issue in observational studies due to differences in characteristics between groups?
Selection bias
Why are cohort studies prone to confounding?
Because they are observational
What makes it difficult to assess the risk of rare disease outcomes in cohort studies?
Very large samples would be required
What is a challenge in conducting cohort studies?
Huge costs and long duration of time required
Why is it difficult to prove causality in cohort studies?
Due to possible bias and confounding
What was the main objective of the British Doctors Study?
To study the association between smoking and lung cancer mortality
How were lung cancer cases assessed in the British Doctors Study?
Through hospital records
What was the outcome of interest in the Seven Countries Study?
Cardiovascular disease mortality
How were deaths from CVD assessed in the Seven Countries Study?
Through hospital records
What was the duration of the Seven Countries Study?
From 1958 to 1998
Test your knowledge of cross-sectional studies, including descriptive measures such as proportions and prevalence, and measures of association like odds ratio and regression coefficients. Learn about the advantages of cross-sectional studies, including ease of performance and cost-effectiveness.
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