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Table 2 Advanced cancer rate among among Volpara density grade categories

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

  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  
  1. VDG Volpara density grade