Test performance

• PPV, NPV, Sens, and Spec from two populations with different disease prevalence

Population A						Population B
		Disease		Total				Disease		Total
		Present	Absent					Present	Absent
Test	Pos					Test	Pos
	Neg						Neg
	Total						Total
Disease prevalence						Disease prevalence
PPV						PPV
NNV						NNV
Sens						Sens
Spec						Spec