Biostatistics & Study Design USMLE Step 1 Practice Question
A 34 year old man who survived childhood Hodgkin lymphoma is followed in a survivorship clinic. Investigators study 2,000 adults who received mantle radiation as children and observe 18 thyroid cancers over 10 years. Based on age matched population rates, only 6 cases would have been expected. Which of the following best describes the standardized incidence ratio for thyroid cancer in this cohort?
Answer choices
- A1.0
- B3.0Correct answer
- C0.33
- D0.67
- E12.0
- F2.0
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