Table 4.
Comparison of mammography and ultrasound findings between the mastalgia and asymptomatic groups
| Total, n (%) | Mastalgia, n (%) | Asymptomatic, n (%) | p | |
|---|---|---|---|---|
| Mammographic breast density (pattern) (n=503) | ||||
| A | 44 (8.7) | 21 (5.6) | 23 (18.3) | a0.001** |
| B | 373 (74.2) | 299 (79.3) | 74 (58.7) | a0.001** |
| C | 80 (15.9) | 54 (14.3) | 26 (20.6) | a0.094 |
| D | 6 (1.2) | 3 (0.8) | 3 (2.4) | b0.169 |
| Mammographic BI-RADS category (n=503) | ||||
| BI-RADS 0 | 278 (55.3) | 210 (55.7) | 68 (54.0) | a0.735 |
| BI-RADS 1 | 62 (12.3) | 29 (7.7) | 33 (26.2) | a0.001** |
| BI-RADS 2 | 127 (25.2) | 110 (29.2) | 17 (13.5) | c0.001** |
| BI-RADS 3 | 22 (4.4) | 15 (4.0) | 7 (5.6) | c0.619 |
| BI-RADS 4 | 8 (1.6) | 8 (2.1) | 0 (0.0) | b0.210 |
| BI-RADS 5 | 6 (1.2) | 5 (1.3) | 1 (0.8) | b1.000 |
| Ultrasound findings† (n=513) | ||||
| Normal | 80 (15.6) | 59 (16.6) | 21 (13.4) | a0.358 |
| Simple cyst(s) | 30 (5.8) | 30 (8.4) | 0 (0.0) | c0.001** |
| Fibroadenoma(s) | 68 (13.3) | 55 (15.4) | 13 (8.3) | c0.039* |
| Fibrocystic disease | 323 (63.0) | 297 (83.4) | 123 (78.3) | b0.168 |
| IMLN | 8 (1.6) | 8 (2.2) | 0 (0.0) | b0.114 |
| Complex cyst(s) | 2 (0.4) | 2 (0.6) | 0 (0.0) | b1.000 |
| Fatty tissue necrosis | 2 (0.4) | 2 (0.6) | 0 (0.0) | b1.000 |
a
Pearson's chi-squared test
b
Fisher's exact test
c
Yates' continuity correction
*
p < 0.05
**
p < 0.01
†
Some cases harbor multiple ultrasound findings
IMLN = intramammary lymph node(s).