Question 24 · LDEK · Basics of medical statistics
The risk of periodontal disease in tobacco smokers was studied in a prospective study. Here are the results. Which of the following is the formula for calculating the relative risk of periodontal disease in tobacco smokers?
- A. 100 : 1000.
- B. (100 : 1000) : (20 : 500).
- C. (100 : 900) : (20 : 480).
- D. (100 : 20) : (900 : 480).
- E. (100 : 120) : (900 : 1380).
Hint
Relative risk compares the risk in exposed people with that in unexposed people, using the row totals as denominators.
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