Which of the Following Statements Is the Most Accurate Description $\text { Age-adjusted death rates per } 100,000$

question 7

Multiple Choice

Which of the following statements is the most accurate description of the risk and relative risk of lung cancer deaths in this study? Use the following information: Lung Cancer and Coronary Health Disease Mortality by Smoking Status
$\text { Age-adjusted death rates per } 100,000$
$\begin{array}{|l|l|l|}\hline & \text { Smokers } & \text { Nonsmokers } \\\hline \text { Lung cancer } & 150 & 70 \\\hline \text { Coronary heart disease } & 700 & 300 \\\hline\end{array}$

[Modified from Doll R,Peto R.Mortality in relation to smoking: 20 years' observations on male British doctors.Br Med J.1976;2(6051) :1525-1536.]

• A) The risk of lung cancer deaths is 2.1 times greater in smokers compared with nonsmokers.
• B) The risk of lung cancer deaths is 2.1 times less in smokers compared with nonsmokers.
• C) Because investigators followed up participants over 20 years, deaths rate cannot be used as a risk.
• D) The risk of lung cancer deaths among smokers is 70 per 100,000.
• E) The risk of lung cancer deaths among nonsmokers is 150 per 100,000.