Table 1. Demographic Characteristics of the US and Mammography Group.
| Characteristics | Mammography (n = 197) | US (n = 43) | P |
|---|---|---|---|
| Age (years) | 45.2 ± 2.8 | 45.1 ± 3.1 | 0.832 |
| Breast disease with high risk for breast cancer | 0.497 | ||
| Absent | 185 (93.9) | 39 (90.7) | |
| Present | 12 (6.1) | 4 (9.3) | |
| Family history of breast cancer | 0.045 | ||
| Absent | 188 (95.4) | 38 (81.4) | |
| Present | 7 (3.6) | 5 (11.6) | |
| N/A | 2 (1.0) | 0 (0) | |
| Breast density | 0.084 | ||
| Non-dense breast | 16 (8.1) | 0 (0) | |
| Dense breast | 181 (91.9) | 43 (100) | |
| Mammography finding | < 0.001 | ||
| Mass only | 101 (51.3) | 0 (0) | |
| Calcification with/without mass | 96 (48.7) | 0 (0) | |
| Negative | 0 (0) | 43 (100) |
N/A = not available, US = ultrasound