Sensitivity helps in Ruling OUT a disease Specificity helps in ruling IN a disease

064. Study the following table carefully and answer the following question:

	Disease
Test result	Present	Absent
+	40	225
-	10	225

What is the sensitivity of diagnostic test?

1. 45

2. 20

3. 80

4. 50

Answer

3. 80

Reference

Park 18^th Edition Page 117

Quality

Thinker

Status

Repeat

QTDF

All Books

Discussion

		True Positive
Sensitivity	=	-------------------------------------	x100
		True Positive +False Negative

Explanation

		40
Sensitivity	=	---------	x100
		40 +10
		40
	=	-----	x100
		50
	=	80

Comments

Almost all exams have one question from these formula

Tips

Sensitivity helps in Ruling OUT a disease - SNOUT

Specificity helps in ruling IN a disease - SPIN