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Table 3 Screening performance measurements and relative risks (95% CI) among Volpara density grade categories

From: Volumetric breast density and risk of advanced cancers after a negative screening episode: a cohort study

BC incidence rate (only invasive)

 

Cases/person-years

Rate

RR (95% CI)

 VDG1–3

110/30390

3.6‰

reference

 VDG 4

56/7513

7.5‰

2.0 (1.5–2.8)

Interval cancer rate

 

Cases/negative screened

Rate

RR (95% CI)

 VDG1–3

18/12709

1.4‰

reference

 VDG 4

22/3129

7.0‰

5.0 (2.7–9.2)

Advanced cancers rate among negative screened

 

Cases/negative screened

Rate

RR (95% CI)

 VDG1–3

14/12709

1.1‰

reference

 VDG 4

13/3129

4.2‰

3.8 (1.8–8.0)

  1. VDG Volpara density grade, BC breast cancer, RR relative risk