Table 1. Baseline characteristics of all patients.
| Characteristic | All patients (%) | Augmentation group (%) | No augmentation group (%) | P |
|---|---|---|---|---|
| No. | 751 | 234 | 517 | |
| Patient demographics | ||||
| Age, yr | 43.6±7.4 | 42.0±6.6 | 44.3±7.6 | <0.001* |
| BMI, kg/m2 | 22.0±2.7 | 21.0±2.3 | 22.5±2.8 | <0.001* |
| Smoking | 34 (4.5) | 15 (6.4) | 19 (3.7) | 0.139 |
| Diabetes | 10 (1.3) | 5 (2.1) | 5 (1.0) | 0.300 |
| Hypertension | 36 (4.8) | 6 (2.6) | 30 (5.8) | 0.082 |
| Radiotherapy | 92 (12.3) | 27 (11.5) | 65 (12.6) | 0.779 |
| Chemotherapy | 301 (40.1) | 89 (38.0) | 212 (41.0) | 0.491 |
| Operation-related variables | ||||
| Mastectomy type | 0.200 | |||
| Skin-sparing | 551 (73.4) | 164 (70.1) | 387 (74.9) | |
| Nipple-sparing | 200 (26.6) | 70 (29.9) | 130 (25.1) | |
| Mastectomy weight (g) | 351.4±167.8 | 259.3±115.7 | 393.1±171.1 | <0.001* |
| ADM use | 453 (60.3) | 139 (59.4) | 314 (60.7) | 0.791 |
| Tissue expander size (cc) | 387.4±91.0 | 354.2±67.1 | 402.5±96.4 | <0.001* |
| Implant size for reconstruction (cc) | 324.5±104.1 | 359.9±74.7 | 308.4±111.3 | <0.001* |
| Implant type | 0.549 | |||
| Smooth | 325 (43.3) | 97 (41.5) | 228 (44.1) | |
| Textured | 426 (56.7) | 137 (58.5) | 289 (55.9) | |
| Implant size for augmentation (cc) | 182.9±37.2 | |||
| Surgeon | 0.002* | |||
| Surgeon 1 | 181 (24.1) | 63 (26.9) | 118 (22.8) | |
| Surgeon 2 | 132 (17.6) | 53 (22.6) | 79 (15.3) | |
| Surgeon 3 | 238 (31.7) | 75 (32.1) | 163 (31.5) | |
| Surgeon 4 | 200 (26.6) | 43 (18.4) | 157 (30.4) |
*, statistically significant. BMI, body mass index; ADM, acellular dermal matrix.