Consider the following 2 × 2 table from a hypothetical cohort study.Calculate the incidence of cardiovascular disease (CVD) among the not exposed participants. $$\begin{array} { | l | c | c | c | }
\hline \text { Serum fasting glucose } & \text { Developed CVD } & \text { Did not develop CVD } & \text { Total } \
\hline \geq 126 \mathrm { mg } / \mathrm { dL } \text { (exposed) } & 125 & 325 & 450 \
\hline

Question

Consider the following 2 × 2 table from a hypothetical cohort study.Calculate the incidence of cardiovascular disease (CVD) among the not exposed participants. $$\begin{array} { | l | c | c | c | } 
\hline \text { Serum fasting glucose } & \text { Developed CVD } & \text { Did not develop CVD } & \text { Total } \
\hline \geq 126 \mathrm { mg } / \mathrm { dL } \text { (exposed) } & 125 & 325 & 450 \
\hline < 126 \mathrm { mg } / \mathrm { dL } \text { (not exposed) } & 50 & 500 & 550 \
\hline \text { Total } & 175 & 825 & 1000 \
\hline
\end{array}$$
A) 9 per 100 population
B) 28 per 100 population
C) 44 per 100 population
D) 50 per 175 population
E) 72 per 100 population

Quizplus · Accepted Answer

The incidence of CVD among the not exposed participants is calculated as the number of new cases of CVD divided by the total number of participants in that group. For the not exposed group, this is 50 cases of CVD out of 550 participants, which equals 9.09 per 100 population when expressed per 100 population. This rounds to 9 per 100 population.

Consider the Following 2 × 2 Table from a Hypothetical