Table 1.
Univariate Relationship between Clinical Predictors and BPE.
| Parameter | P Value | |||
|---|---|---|---|---|
| BPE Quantitative measurement (pixel value of ROI) | BPE category | |||
| minimum value | maximum value | difference value | ||
| Age | ||||
| all subjects | 0.143 | 0.003 | 0.010 | 0.004 |
| premenopausal subjects | 0.639 | 0.577 | 0.697 | 0.727 |
| Breast density | 0.200 | 0.395 | 0.088 | 0.586 |
| Menopausal | 0.028 | <0.001 | <0.001 | <0.001 |
| Menstrual cycle timing | 0.067 | 0.094 | ||
| Days 8–14 vs Days 1–7 | 1.000 | 1.000 | ||
| Days 8–14 vs Days 22–28 | 1.000 | 1.000 | ||
| Days 8–14 vs Days 15–21 | 0.006 | 0.016 | ||
| Days 1–7 vs Days 22–28 | 1.000 | 1.000 | ||
| Days 1–7 vs Days 15–21 | 0.246 | 0.069 | ||
| Days 22–28 vs Days 15–21 | 1.000 | 0.236 | ||
BPE, background parenchymal enhancement; ROI, region-of-interest.