A (real) test was constructed as a way of checking to see Retinal Vein Pulsation

Question

A (real) test was constructed as a way of checking to see Retinal Vein Pulsation (RVP) was reliable as a test for Intracranial Pressure (IP). The absence of RVP is considered to be indicative of dangerous IP. So the test looks for absence of RVP and in that sense "absence" is a "positive" outcome. A study enrolled 189 patients and each patient was given this RVP test. Results of the testing, along with a categorization of High or Normal IP is in the table. What is the sensitivity of this test? 100% 0% 12% 88%

Explanation / Answer

Sensitivity = a / (a + c)

Here in this case,

a = 43, c = 0

So,

Sensitivity = 43 / (43 + 0) = 1 or 100%

Option A is correct.

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