Table 3 Comparison of baseline characteristics between the two groups after case–control matching
Positive margins | Negative margins | P | SMD (%) | |
|---|---|---|---|---|
N | 83 | 83 | ||
Age (years) | 1.000 | 0.0 | ||
≤ 50 | 40 (48.2%) | 40 (48.2%) | ||
> 50 | 43 (51.8%) | 43 (51.8%) | ||
BMI | 25.1 ± 3.4 | 25.2 ± 3.4 | 0.913 | 1.7 |
Menopausal status | 1.000 | 0.0 | ||
Postmenopausal | 41 (49.4%) | 41 (49.4%) | ||
Non-postmenopausal | 42 (50.6%) | 42 (50.6%) | ||
Tumor location | 1.000 | 0.0 | ||
Upper outer quadrant | 32 (38.6%) | 32 (38.6%) | ||
The other quadrants | 51 (61.4%) | 51 (61.4%) | ||
Palpability | 1.000 | 0.0 | ||
Yes | 78 (94.0%) | 78 (94.0%) | ||
No | 5 (6.0%) | 5 (6.0%) | ||
Multiple lesions | 1.000 | 0.0 | ||
Yes | 1 (1.2%) | 1 (1.2%) | ||
No | 82 (98.8) | 82 (98.8) | ||
Tumor size (cm) | 2.0 ± 0.73 | 1.9 ± 0.64 | 0.190 | 22.6 |
Microcalcifications | 1.000 | 0.0 | ||
Yes | 26 (31.3%) | 26 (31.3%) | ||
No | 57 (68.7%) | 57 (68.7%) |