Which of the Following Statements Is the Most Accurate Summary

question 6

Multiple Choice

Which of the following statements is the most accurate summary of the evidence linking physical activity to a reduced risk for colon cancer?

• A) It is consistent across leisure time and occupational physical activity and across different study designs
• B) Studies using colorectal cancer as the outcome measure have consistently found a strong, inverse link between level of physical activity and risk
• C) Occupational, but not leisure-time, physical activity is inversely associated with risk of colon cancer
• D) The inverse relationship between physical activity and risk for colon cancer is eliminated after controlling for known confounders

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