Table 1 Patient Characteristics
|  | Study Population | Control | vs. | MPH | p | BMI < 30 | vs. | BMI ≥ 30 | p |
|---|---|---|---|---|---|---|---|---|---|
N | 42 | 21 | Â | 21 | Â | 25 | Â | 17 | Â |
Demographics | |||||||||
 Age (yrs.), mean ± SD (range) | 64.9 ± 4.5 (23–89) | 68.2 ± 15.7 (23–89) |  | 61.2 ± 12.6 (34–82) | 0.140 | 69.2 ± 13.59 (38–89) |  | 58.6 ± 13.8 (23–80) | 0.017 |
 BMI, mean ± SD (range) | 30.7 ± 8.3 (19–59) | 30.9 ± 8.4 (19–59) |  | 30.4 ± 8.4 (21–59) | 0.843 | 26.2 ± 2.9 (19–30) |  | 37.3 ± 9.3 (31–59) | 0.000 |
 Postmenopausal | 92.9% | 95.2% |  | 90.5% | 0.500 | 96.0% |  | 88.2% | 0.338 |
Procedure | |||||||||
 SM without SLNB | 21.4% | 55.6% |  | 44.4% | 0.605 | 20.0% |  | 23.5% | 0.784 |
 SM with SLNB | 47.6% | 55.0% |  | 45.0% | 48.0% |  | 47.1% | 0.952 | |
 MRM | 31% | 38.5% |  | 61.5% | 32.0% |  | 29.4% | 0.859 | |
Pathology | |||||||||
 Benign | 14.3% | 23.8% |  | 4.8% | 0.030 | 4.0% |  | 20.0% | 0.135 |
 ADH | 2.4% | 4.8% |  | 0% | 4.0% |  | 0% | ||
 DCIS | 14.3% | 4.8% |  | 23.8% | 20.0% |  | 4.0% | ||
 IDC | 59.5% | 66.7% |  | 52.4% | 64.0% |  | 36.0% | ||
 ILC | 9.5% | 0% |  | 9.4% | 8.0% |  | 8.0% | ||
Stage | |||||||||
 T 0 | 26.2% | 23.7% |  | 33.5% | 0.130 | 24% |  | 29.4% | 0.807 |
 T 1 | 31% | 42.9% |  | 19.0% | 32% |  | 29.4% | ||
 T 2 | 26.2% | 28.6% |  | 30.8% | 24% |  | 29.4% | ||
 T 3 | 11.9% | 0% |  | 11.9% | 12% |  | 11.8% | ||
 T 4 | 4.8% | 4.8% |  | 4.8% | 8% |  | 0% | ||
 N x | 4.7% | 4.80% |  | 4.8% | .0755 | 4.00% |  | 0.0% | 0.729 |
 N 0 | 52.4% | 57.10% |  | 52.4% | 52.00% |  | 44.0% | ||
 N 1 | 16.7% | 19.00% |  | 16.7% | 16.00% |  | 12.0% | ||
 N 2 | 11.9% | 9.50% |  | 11.9% | 16.00% |  | 4.0% | ||
 N 3 | 14.3% | 9.5% |  | 14.3% | 16.00% |  | 8.0% | ||
Resection | |||||||||
 R0 | 97.4% | 100% |  | 95.2% | 0.311 | 100% |  | 94% | 0.220 |
 R1 | 2.4% | 0.0% |  | 4.8% | 0% |  | 6% | ||