The incidence of disease X is 56/1,000 per year among smokers and 33/1,000 per year among nonsmokers.What proportion of cases of disease X are due to smoking among those who smoke?

A) 23%
B) 33%
C) 41%
D) 56%
E) 59%

Question

Taniya Maldonado · Accepted Answer

Final Answer : C, Explanation :  In other words,this question asks for the attributable risk.The attributable risk is calculated as follows: (incidence in exposed - incidence in unexposed)/(incidence in exposed); in this example: (56/1,000 - 33/1,000)/(56/1,000) = 0.41,or 41%.

The incidence of disease X is 56/1,000 per year among smokers and 33/1,000 per year among nonsmokers.What proportion of cases of disease X are due to smoking among those who smoke?

A) 23%
B) 33%
C) 41%
D) 56%
E) 59%

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Learning Objectives

Related questions

The incidence of disease X is 56/1,000 per year among smokers and 33/1,000 per year among nonsmokers.What proportion of cases of disease X are due to smoking among those who smoke?A) 23%B) 33%C) 41%D) 56%E) 59%

Definitions

Learning Objectives

Learning Objectives

Related questions

The incidence of disease X is 56/1,000 per year among smokers and 33/1,000 per year among nonsmokers.What proportion of cases of disease X are due to smoking among those who smoke?

A) 23%
B) 33%
C) 41%
D) 56%
E) 59%