Table 2. Baseline characteristics of the propensity score one-to-one matched patients.
| Characteristic | Augmentation group (%) | No augmentation group (%) | Standardized mean difference | P |
|---|---|---|---|---|
| No. | 200 | 200 | ||
| Patient demographics | ||||
| Age, yr | 42.3±6.7 | 42.7±7.1 | 0.063 | 0.488 |
| BMI, kg/m2 | 21.3±2.3 | 21.2±2.1 | 0.039 | 0.668 |
| Smoking | 10 (5.0) | 10 (5.0) | <0.001 | >0.999 |
| Diabetes | 3 (1.5) | 3 (1.5) | <0.001 | >0.999 |
| Hypertension | 6 (3.0) | 7 (3.5) | 0.028 | 0.782 |
| Radiotherapy | 22 (11.0) | 28 (14.0) | 0.091 | 0.355 |
| Chemotherapy | 77 (38.5) | 83 (41.5) | 0.061 | 0.540 |
| Operation-related variables | ||||
| Mastectomy type | 0.044 | 0.655 | ||
| Skin-sparing | 141 (70.5) | 145 (72.5) | ||
| Nipple-sparing | 59 (29.5) | 55 (27.5) | ||
| Mastectomy weight (g) | 278.5±111.9 | 284.5±106.6 | 0.055 | 0.317 |
| ADM use | 119 (59.5) | 120 (60.0) | 0.010 | 0.922 |
| Tissue expander size (cc) | 358.4±69.8 | 349.5±64.0 | 0.133 | 0.107 |
| Implant size for reconstruction (cc) | 369.7±72.7 | 251.1±91.0 | 1.439 | <0.001* |
| Implant type | 0.061 | 0.536 | ||
| Smooth | 81 (40.5) | 87 (43.5) | ||
| Textured | 119 (59.5) | 113 (56.5) | ||
| Implant size for augmentation (cc) | 183.1±35.0 | |||
| Surgeon | 0.975 | |||
| Surgeon 1 | 51 (25.5) | 55 (27.5) | 0.045 | |
| Surgeon 2 | 42 (21.0) | 41 (20.5) | 0.012 | |
| Surgeon 3 | 66 (33.0) | 64 (32.0) | 0.021 | |
| Surgeon 4 | 41 (20.5) | 40 (20.0) | 0.012 |
*, statistically significant. BMI, body mass index; ADM, acellular dermal matrix.