Skip to main content

Advertisement

Table 3 Median (interquartile range) changes in volumetric density measures by breast side and differences between sides for breast cancer cases, stratified on tumor size

From: Automated volumetric breast density measures: differential change between breasts in women with and without breast cancer

  Ipsilateral change** Contralateral change** Difference p value
Tumors ≤ 2 cm (N = 860)
 VPD (%) − 0.30 (− 1.24, 0.65) − 0.32 (− 1.26, 0.47) 0.07 (− 0.74, 0.87) 0.23
 DV (cm3) − 2.52 (− 9.70, 3.98) − 2.72 (− 9.51, 3.35) 0.02 (− 6.62, 7.03) 0.76
Tumors 2–5 cm (N = 243)
 VPD (%) − 0.18 (− 1.67, 0.93) − 0.67 (− 2.00, 0.20) 0.40 (− 0.66, 1.63) < .001
 DV (cm3) − 0.93 (− 10.04, 9.64) − 3.03 (− 12.97, 3.49) 4.15 (− 4.83, 13.09) < .001
Tumors > 5 cm (N = 36)
 VPD (%) 0.34 (− 1.27, 2.13) − 0.45 (− 1.74, 0.04) 1.18 (0.02, 2.47) < .001
 DV (cm3) 11.78 (− 0.99, 25.14) − 3.12 (− 9.53, 1.97) 12.97 (2.72, 24.89) < .001
  1. VPD volumetric percent density, DV dense volume
  2. **Change was calculated by subtracting the density at the earliest mammogram from the density at the mammogram closest to diagnosis. A negative value reflects a decrease over time