Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism

Table 1

Mean differences in patients’ characteristics by sex ().

	Female	Male
Parameters	()	()
	Mean (SD)	Mean (SD)
Age, y	23.31 (4.06)	22.42 (3.73)	0.327
Setback, mm
Right side	9.60 (3.31)	11.27 (3.41)	0.037
Left side	9.01 (3.34)	11.11 (3.57)	0.012
Operation time, min	229.39 (40.82)	249.52 (48.86)	0.065
Blood loss, mL	86.12 (54.98)	104.03 (56.73)	0.175
Preoperation
RBCs, ×10^6/μL	4.51 (0.45)	5.10 (0.60)	<0.001^†
Hgb, g/dL	13.21 (1.06)	15.13 (1.00)	<0.001^†
Hct, %	39.35 (2.80)	44.90 (2.83)	<0.001^†
Postoperation
RBCs, ×10^6/μL	3.92 (0.37)	4.40 (0.55)	<0.001^†
Hgb, g/dL	11.60 (1.15)	13.17 (0.94)	<0.001^†
Hct, %	34.42 (3.01)	38.73 (2.75)	<0.001^†
Reduced blood ingredients
RBCs, ×10^6/μL	0.59 (0.23)	0.70 (0.22)	0.034
Hgb, g/dL	1.61 (0.61)	1.96 (0.74)	0.035
Hct, %	4.93 (1.75)	6.17 (1.98)	0.007

= number of patients.
-test statistics; values for differences by sex.
; .