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Skyscape - USMLE® Question of the Week


A prospective cohort study was conducted to assess the relationship between caffeine consumption and the risk of colon cancer in middle-aged women. The study showed that caffeine consumption decreases the risk of colon cancer with a relative risk of 0.83 and p value of 0.04. The fact that the study was conducted specifically in middle- aged women raises most concerns regarding which of the following issues?

A Bias
B Generalizability
C Internal validity
D Reliability
E Reproducibility

No items found.

iOS & Android Apps

980+ total questions*
1000+ total questions*
450 Questions, Ans and Rationales
First Aid for the USMLE Step 1
Includes Netters Anatomy Atlas
Anatomy Flash Cards
* In app purchase required


Use the World’s most popular USMLE® medical review books content in your program. With Skyscape App’s, students can study Anytime-Anywhere. Tutors can view students progress on a web dashboard. Email us for a demo and bulk purchase options.