Descriptive statistics of included patients who underwent bimaxillary orthognathic surgery for dentofacial deformity (n=156)
| Variable | Category | Value |
|---|---|---|
| Sex | Male | 47 (30.1) |
| Female | 109 (69.9) | |
| Age (yr) | 27.0±10.8 | |
| Body mass index (kg/m2) | 21.3±3.1 | |
| Tranexamic acid | No use | 17 (10.9) |
| Use | 139 (89.1) | |
| Type of surgery | LF1+BSSRO (yes) | 156±100 |
| Multiple answers allowed | IVRO (yes) | 6 (3.8) |
| Genioplasty (yes) | 5 (3.2) | |
| Multi-segment osteotomy (yes) | 2 (1.3) | |
| Mandibular midline osteotomy (yes) | 1 (0.6) | |
| Tooth extraction (yes) | 2 (1.3) | |
| Systemic disease | Hypertension | 4±0 |
| Liver disease | 14±0 | |
| Diabetes mellitus | 1±0 | |
| Abnormal blood clotting | 3±0 | |
| Operation time (min) | 197.6±38.3 | |
| ASA-PS | Class 1 | 70 (44.9) |
| Class 2 | 86 (55.1) | |
| Intraoperative blood loss (mL) | 124.0±38.3 | |
| In–out balance (mL) | 876.8±506.6 | |
| Blood test | Hemoglobin change (g/dL) | −1.9±1.0 |
| Hematocrit change (%) | −5.8±4.2 | |
| Preoperative platelet in count (104/µL) | 253.6±50.3 | |
| Preoperative PT-INR in preoperation | 0.984±0.07 |
(LF-1: Le Fort I osteotomy, BSSRO: bilateral sagittal split ramus osteotomy, IVRO: intraoral vertical ramus osteotomy, ASA-PS: American Society of Anesthesiology physical status, PT-INR: international normalized ratio of prothrombin time)
Values are presented as number (%) or mean±standard deviation.