Table 3.

Screening mammography performance metrics based on initial vs. final assessment, among women with a recent screening mammogram in the Breast Cancer Surveillance Consortium, 2005–2017.

	Initial Assessment		Final Assessment
Screening Performance Metric	Estimate	95% CI	Estimate	95% CI
Standard performance measures
Cancer detection rate, per 1000	4.1	3.9, 4.3	4.1	3.8, 4.3
Interval cancer rate, per 1000	0.69	0.64, 0.74	0.77	0.71, 0.83
Sensitivity, %	85.7	84.8, 86.6	84.1	83.0, 85.1
Specificity, %	91.8	91.0, 92.4	97.4	97.0, 97.6
Screening benefit
Stage I or IIa screen-detected invasive cancers, per 1000	2.7	2.5, 2.8	2.6	2.5, 2.8
Screening false-alarms
False-positive recall for additional imaging, per 1000	82.1	75.3, 89.4	NA	NA
False-positive short interval follow-up recommendation, per 1000	NA	NA	16.5	13.9, 19.5
False-positive biopsy recommendation, per 1000	NA	NA	9.8	8.5, 11.3
Screening failures
Stage IIb or higher interval invasive cancers, per 1000	0.16	0.15, 0.18	0.18	0.16, 0.20
Stage IIb or higher screen-detected invasive cancers, per 1000	0.29	0.26, 0.33	0.27	0.24, 0.31

CI, confidence interval; NA, not applicable.