Sensitivity versus Specificity

	A	B	D	E	F	G	H	I	J
1	Understanding Sensitivity and Specificity of Diagonostics
2		Enter Values Here
3	Population Tested	1,000,000				1,000,000
4	Prevalence of Condition Tested (%)	2
5	Sensitivity of Test (% of true positive individuals that test positive)	98%
6	Specificity of Test (% of true negative individuals that test negative)	98%		Have Antibodies				No Antibodies
7				2000000				-1000000
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10			True Positive		False Positive		False Negative		True Negative
11			1960000		40000		-20000		-980000
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15			Total number of individuals who test positive			1940000
16			Probability positive individual has antibodies			101.03%
17			Probability positive individual does not have antibodies			-1.03%
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