Two physicians were asked to independently classify 250 ultrasounds as positive or negative.The comparison of their classification is shown in the following table.What is the simple percent agreement between the two physicians out of the total? Use the following table to answer the question. Number of Positive and Negative Cases by Physician 1 and Physician 2
$$\begin{array}{r}
{ \text { Physician 1 } }\quad\quad\
\begin{array} { | l | l | l | }
\hline{ \text { Physician } 2 } \
\hline & \text { Positive } & \text { Negative } \
\hline \text { Positive } & 45 & 15 \
\hline \text { Negative } & 25 & 165 \
\hline
\end{array}\end{array}$$
A) 24%
B) 28%
C) 53%
D) 67%
E) 84%

Question

Two physicians were asked to independently classify 250 ultrasounds as positive or negative.The comparison of their classification is shown in the following table.What is the simple percent agreement between the two physicians out of the total? Use the following table to answer the question. Number of Positive and Negative Cases by Physician 1 and Physician 2
$$\begin{array}{r}
{ \text { Physician 1 } }\quad\quad\
\begin{array} { | l | l | l | } 
\hline{ \text { Physician } 2 } \
\hline & \text { Positive } & \text { Negative } \
\hline \text { Positive } & 45 & 15 \
\hline \text { Negative } & 25 & 165 \
\hline
\end{array}\end{array}$$
A) 24%
B) 28%
C) 53%
D) 67%
E) 84%

Quizplus · Accepted Answer

The simple percent agreement is calculated by adding the number of agreements (both positive and negative) and dividing by the total number of cases. Here, the agreements are 45 (both positive) + 165 (both negative) = 210. The total number of cases is 250. So, the percent agreement is (210/250) * 100 = 84%.

Two Physicians Were Asked to Independently Classify 250 Ultrasounds as Positive