Table 4 Comparison of baseline characteristics between the two groups after propensity score matching
Positive margins | Negative margins | P | SMD(%) | |
|---|---|---|---|---|
N | 118 | 118 | ||
Age (years) | 0.896 | 1.6 | ||
≤ 50 | 53 (44.9%) | 52 (44.1%) | ||
> 50 | 65 (55.1%) | 66 (55.9%) | ||
BMI | 24.9 ± 3.4 | 25.3 ± 3.7 | 0.445 | 9.9 |
Menopausal status | 0.794 | 3.4 | ||
Postmenopausal | 56 (47.5%) | 58 (49.2%) | ||
Non-postmenopausal | 62 (52.5%) | 60 (50.8%) | ||
Tumor location | 0.598 | 6.9 | ||
Upper outer quadrant | 48 (40.7%) | 52 (44.1%) | ||
The other quadrants | 70 (59.3%) | 66 (55.9%) | ||
Palpability | 1.000 | 0.0 | ||
Yes | 103 (87.3%) | 103 (87.3%) | ||
No | 15 (12.7%) | 15 (12.7%) | ||
Multiple lesions | 0.154 | 18.5 | ||
Yes | 9 (7.6%) | 4 (3.4%) | ||
No | 109 (92.4%) | 114 (96.6%) | ||
Tumor size (cm) | 2.0 ± 0.9 | 2.1 ± 1.0 | 0.263 | 14.6 |
Microcalcifications | 0.596 | 6.9 | ||
Yes | 50 (42.4%) | 46 (39.0%) | ||
No | 68 (57.6%) | 72 (61.0%) |