Table 1 Patient characteristics in relation to mammography failure (yes/no)
Characteristic | Visible on mammography and US | Visible only on US (mammography failure) | ||
|---|---|---|---|---|
Mean or n | SD or % | Mean or n | SD or % | |
Age | 60.2 | 12.5 | 52.5 | 12.1 |
BMI | 26.4 | 4.7 | 23.7 | 3.5 |
PMD | 34.5 | 18.3 | 51.3 | 20.5 |
Previous breast surgery | ||||
No | 1080 | 87.4 | 79 | 80.6 |
Yes | 156 | 12.6 | 19 | 19.4 |
Menopausal and HRT status | ||||
Premenopausal | 269 | 21.8 | 46 | 46.9 |
Postmenopausal and no HRT | 721 | 58.3 | 28 | 28.6 |
Postmenopausal and HRT | 246 | 19.9 | 24 | 24.5 |
Imaging technique | ||||
Analog | 761 | 61.6 | 55 | 56.1 |
Digital | 475 | 38.4 | 43 | 43.9 |