Table 3.

Test dataset performance for Drugs X and Y to detect true signals

	Accuracy	Sensitivity	Specificity	PPV	NPV	AUC
Drug Xa	98.3% (n = 682/694)	50.0% (n = 4/8)	98.8% (n = 678/686)	33.3% (n = 4/12)	99.4% (n = 678/682)	0.84
Drug Yb	95.9% (n = 284/296)	55.6% (n = 5/9)	97.2% (n = 279/287)	38.5% (n = 5/13)	98.6% (n = 279/283)	0.81

AUC area under the curve, NPV negative predictive value, PPV positive predictive value

^a6 months post-marketing data

^b12 months post-marketing data