Table 2. Comparison of Our Results with an Acceptable Range of Mammography on BI-RADS 2013.

n=1727	US results	Acceptable ranges of diagnostic mammography performance
Recall rate	5.8% (100/1727)	5-12%
Supplemental cancer detection yield per 1000 cases	4.6	≥2.5
Sensitivity	88.9% (8/9)	≥75%
Specificity	94.6% (1626/1718)	88-95%
PPV1	8.0% (8/100)	3-8%
PPV2	28.0% (7/25)	20-40%
NPV	99.9% (1626/1627)
Tumors found-stage 0 or 1	75% (6/8)
Tumors found-minimal cancer*	62.5% (5/8)	>50%
Node-negative invasive cancers	87.5%	>80%

PPV, positive predictive values; NPV, negative predictive values; BI-RADS, Breast Imaging Reporting and Data System.

^*Minimal cancer is invasive cancer ≤1 cm or ductal carcinoma in situ.