Question

In a screening test for DM out of 1000 population, 90 were positive. Then the gold standard test was done in which 100 were positive. Calculate the sensitivity?

• A. 90/100
• B. 100/110
• C. 80/100
• D. 100/100

Answer 1

The Correct Option is A

Sensitivity is a measure of the test's ability to correctly identify those with the disease (true positives) among all individuals who actually have the disease. It is calculated using the formula:

Sensitivity = (True Positives) / (True Positives + False Negatives)

In this problem:

• The gold standard test identified 100 true positives.
• The screening test identified 90 positives, which are assumed to be true positives as compared to the gold standard.

Thus, applying the formula:

Sensitivity = 90/100

Therefore, the sensitivity of the screening test is 90/100 or 90%.