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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
| 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 |
