Which of the following statements is the most accurate description of the attributable risk (deaths per 100,000) of coronary heart disease for smokers in this study? Use the following information: Lung Cancer and Coronary Health Disease Mortality by Smoking Status
$700300\begin{array}{r}\text { Age-adjusted death rates per } 100,000\quad\quad\\\begin{array} { | l | l | l | } \hline & \text { Smokers } \quad\quad\quad\quad\quad& \text { Nonsmokers } \quad\quad\quad\\\hline \text { Lung cancer } & 150 & 70 \\\hline \text { Coronary heart disease } & 700 & 300 \\\hline\end{array}\end{array}$ [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 attributable risk of coronary heart disease deaths is 700 deaths per 100,000.
B) The attributable risk of coronary heart disease deaths is 400 deaths per 100,000.
C) Attributable risk cannot be used as an indicator of the disease burden reduction that could be achieved if the risk factor eliminated.
D) The risk of coronary heart disease deaths among smokers is 70 per 100,000.
E) The risk of coronary heart disease deaths among nonsmokers is 30 per 100,000.

Question

Which of the following statements is the most accurate description of the attributable risk (deaths per 100,000) of coronary heart disease for smokers in this study? Use the following information: Lung Cancer and Coronary Health Disease Mortality by Smoking Status

700300\begin{array}{r}\text { Age-adjusted death rates per } 100,000\quad\quad\\\begin{array} { | l | l | l | } \hline & \text { Smokers } \quad\quad\quad\quad\quad& \text { Nonsmokers } \quad\quad\quad\\\hline \text { Lung cancer } & 150 & 70 \\\hline \text { Coronary heart disease } & 700 & 300 \\\hline\end{array}\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 attributable risk of coronary heart disease deaths is 700 deaths per 100,000.
B) The attributable risk of coronary heart disease deaths is 400 deaths per 100,000.
C) Attributable risk cannot be used as an indicator of the disease burden reduction that could be achieved if the risk factor eliminated.
D) The risk of coronary heart disease deaths among smokers is 70 per 100,000.
E) The risk of coronary heart disease deaths among nonsmokers is 30 per 100,000.

Abigail Bristow · Accepted Answer

Final Answer : B, Explanation :  The attributable risk of coronary heart disease for smokers is calculated by subtracting the rate of disease in nonsmokers from the rate in smokers, which is 700 - 300 = 400 deaths per 100,000.

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