From: A clinical model for identifying the short-term risk of breast cancer
Mammographic features | Cases (n = 433) | Control subjects (n = 1732) | p Valuea |
---|---|---|---|
Percentage mammographic density on tumor side, median (IQR) | 23.0 (6.1–44.1) | 12.2 (2.4–32.8) | 4.0 × 10−10 |
Percentage mammographic density on nontumor side, median (IQR) | 21.7 (5.1–43.4) | 12.5 (2.7–33.2) | 2.5 × 10−7 |
Tumor vs. nontumor side, percentage mammographic density | 1.1 (7.8) | – | 3.4 × 10−3 |
Number of microcalcifications on tumor side, mean (SD) | 6.1 (15.3) | 2.6 (13.1) | 4.0 × 10−20 |
Number of microcalcifications on nontumor side, mean (SD) | 3.4 (13.0) | 2.6 (12.2) | 0.03 |
Tumor vs. nontumor side, microcalcifications | 2.7 (17.9) | – | 1.9 × 10−3 |
Number of masses on tumor side, mean (SD) | 0.77 (0.92) | 0.56 (0.76) | 8.4 × 10−6 |
Number of masses on nontumor side, mean (SD) | 0.51 (0.75) | 0.55 (0.78) | 0.39 |
Tumor vs. nontumor side, masses | 0.26 (1.1) | – | 9.2 × 10−3 |
Individual absolute difference between breastsb | |||
Percentage mammographic density, mean (SD) | 3.8 (4.0) | 3.1 (3.7) | 1.7 × 10−6 |
Microcalcifications, mean (SD) | 2.9 (6.1) | 1.6 (5.7) | 4.0 × 10−16 |
Number of masses, mean (SD) | 0.33 (0.42) | 0.28 (0.40) | 0.02 |