Table 2.

Advanced cancer rate among among Volpara density grade categories

	Total	VDG1	VDG2	VDG3	VDG4	p trend
Detection rate of advanced cancers 1st round (‰ (95% CI))	2.0 (1.4–2.8)	2.6 (1.1–5.1)	1.8 (0.7–3.6)	1.6 (0.7–3.0)	2.5 (1.1–5.0)	0.661
Screen-detected 1st round stage II+	n = 32	n = 8	n = 7	n = 9	n = 8
Rate of advanced cancers among women screened negative 1st round (‰ (95% CI))	1.7 (1.1–2.5)	1.0 (0.2–2.8)	1.3 (0.4–3.0)	1.1 (0.4–2.3)	4.2 (2.2–7.1)	0.003
Interval cancers stage II+	n = 16	n = 2	n = 4	n = 4	n = 6
Screen-detected 2nd round stage II+	n = 11	n = 1	n = 1	n = 2	n = 7

VDG Volpara density grade