Table 2. Procedural details (by breast).
* P-value is SimpliDerm vs. AlloDerm RTU
hADM: human cadaveric acellular dermal matrix; RTU: ready-to-use
| All Patients | SimpliDerm | AlloDerm RTU | P-value* | |
| (N=181) | (n=67) | (n=114) | ||
| Plane of expander/implant placement | <0.001 | |||
| Prepectoral | 149 (82.3%) | 67 (100.0%) | 82 (71.9%) | -- |
| Subpectoral | 32 (17.7%) | 0 (0.0%) | 32 (28.1%) | -- |
| Intraoperative expander fill volume (mL), mean ± SD | 327.7 ± 167.0 | 358.6 ± 191.3 | 309.5 ± 147.9 | 0.074 |
| hADM perforated (versus not) | 0.121 | |||
| Yes | 76 (42.0%) | 26 (38.8%) | 50 (43.9%) | -- |
| Unknown | 26 (14.4%) | 6 (9.0%) | 20 (17.5%) | -- |
| Mastectomy Type | 0.600 | |||
| Skin-sparing | 89 (49.2%) | 31 (46.3%) | 58 (50.9%) | -- |
| Nipple-sparing | 91 (50.3%) | 36 (53.7%) | 55 (48.2%) | -- |
| Simple Mastectomy | 1 (0.6%) | 0 (0.0%) | 1 (0.9%) | -- |
| Bilateral or Unilateral | 0.396 | |||
| Bilateral | 148 (81.8%) | 58 (86.6%) | 90 (78.9%) | -- |
| Unilateral – left | 17 (9.4%) | 4 (6.0%) | 13 (11.4%) | -- |
| Unilateral – right | 16 (8.8%) | 5 (7.5%) | 11 (9.6%) | -- |
| Mastectomy Indication | 0.812 | |||
| Malignancy (therapeutic) | 158 (87.3%) | 59 (88.1%) | 99 (86.8%) | -- |
| Prophylactic | 23 (12.7%) | 8 (11.9%) | 15 (13.2%) | -- |