Table 1 Results of the chi-square test
Variables | All patients, no. (%) | Patients, no. (%) | P value | ||
|---|---|---|---|---|---|
Bleeding<459 g | Bleeding≧459 g | ||||
Sex | Male | 77 (36.2%) | 61 (79.2%) | 16 (20.8%) | 0.053 |
Female | 136 (63.8%) | 121 (89%) | 15 (11%) | ||
Age | ≧27 | 94 (44.1%) | 85 (90.4%) | 9 (9.6%) | 0.067 |
27> | 119 (55.9%) | 97 (81.5%) | 22 (18.5%) | ||
BMI | ≧25 | 13 (6.1%) | 8 (61.5%) | 5 (38.5%) | 0.012 |
25> | 200 (93.9%) | 174 (87%) | 26 (13%) | ||
Circulating blood volume | ≧3850 g | 82 (38.5%) | 65 (79.3%) | 17 (20.7%) | 0.043 |
3850 g> | 131 (61.5%) | 117 (89.3%) | 14 (10.7%) | ||
Diagnosis of maxillary deformity | Maxillary prognathism | 23 (10.8%) | 18 (78.3%) | 5 (21.7%) | 0.387 |
Maxillary retrusion | 72 (33.8%) | 60 (83.3%) | 12 (16.7%) | ||
Facial asymmetry | 118 (55.4%) | 104 (88.1%) | 14 (11.9%) | ||
Direction of maxillary movement | PNS≧4mm | 10 (4.7%) | 6 (60%) | 4 (40%) | 0.019 |
4mm>PNS | 203 (95.7%) | 176 (86.7%) | 27 (13.3%) | ||
Operative duration | ≧4 h | 105 (49.3%) | 79 (75.2%) | 26 (24.8%) | 0.001 |
4 h> | 108 (50.7%) | 103 (95.4%) | 5 (4.6%) | ||
Bad split | Yes | 5 (2.3%) | 4 (80%) | 1 (20%) | 0.727 |
No | 208 (97.7%) | 178 (85.6%) | 30 (14.4%) | ||
Injury of nasal mucosa | Yes | 86 (40.4%) | 67 (77.9%) | 19 (22.1%) | 0.01 |
No | 127 (59.6%) | 115 (90.6%) | 12 (9.4%) | ||
Blood type | Type O | 64 (30%) | 54 (84.4%) | 10 (15.6%) | 0.771 |
Exclusive of type O | 149 (70%) | 128 (85.9%) | 21 (14.1%) | ||