Table 3.
Comparison of surgical outcomes in the unmatched and matched cohorts
| Unmatched cohorts 1005 patients |
Matched cohorts 618 patients |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| noMRI group 498 patients |
MRI group 507 patients |
Difference for the MRI group | noMRI group 309 patients |
MRI group 309 patients |
Difference for the MRI group | |||||
| % | OR | p | % | OR | p | |||||
| First-line mastectomy | 71 (14.3%) | 170 (33.5%) | + 19.2% | 3.03 | < 0.001 | 34 (11.0%) | 62 (20.1%) | + 9.1% | 2.03 | 0.003 |
| Reoperation | 100 (20.1%) | 63 (12.4%) | − 7.7% | 0.56 | 0.001 | 68 (22.0%) | 31 (10.0%) | − 12.0% | 0.40 | < 0.001 |
| Overall mastectomy (first-line + second-line) | 101 (20.3%) | 190 (37.5%) | + 17.2% | 2.36 | < 0.001 | 55 (17.8%) | 72 (23.3%) | + 5.5% | 1.40 | 0.111 |
MRI magnetic resonance imaging, OR odds ratio