A qualitative study into the difficulties experienced by healthcare decision makers when reading a Cochrane diagnostic test accuracy review

Table 1 Two-by-two table and derivative test accuracy measures

		Reference standard (disease status)		Test accuracy measures ↓
		Disease present	Disease absent	Test accuracy measures ↓
Index test (test under evaluation)	Positive result	True positive (TP)	False positive (FP)	Positive predictive value = TP/(TP+FP)
Index test (test under evaluation)	Negative result	False negative (FN)	True negative (TN)	Negative predictive value= TN/(TN+FN)
Test accuracy measures →		Sensitivity = TP/(TP+FN)	Specificity = TN/(TN+FP)	Diagnostic odds ratio = (TPxTN)/(FPxFN)

ISSN: 2046-4053