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Table 4 Mean differences between the surgical groups, where: Group 1: Bimaxillary Surgery, Group 2: Bimaxillary with bone graft, Group 3: Maxillary, Group 4: Maxillary with bone graft

From: Predictors of intra-operative blood loss and blood transfusion in orthognathic surgery: a retrospective cohort study in 92 patients

Groups

N

Age

BMI

EBL

Duration

PreHGB

PreHCT

PostHGB

PostHCT

Group 1

42

24.69±6.2

21.70±3.8

680.95±313.12

5:58±1:19

12.94±2.0

38.51±4.8

9.76±2.1

29.42±5.6

Group 2

19

22.79±6.8

21.48±3.0

744.74±367

6:28±1:07

14.14±1.8

41.54±4.8

9.82±1.6

29.26±4.2

Group 3

21

20.76±5.3

22.61±3.9

495.24±517.91

3:25±2:00*

13.64±2.3

40.66±6.7

11.25±2.6

33.58±7.7*

Group 4

10

22.10±5.0

21.59±3.8

665.00±456.47

6:26±1:11

13.97±1.2

41.61±3.5

10.53±2.0

31.29±5.4

Total

92

23.12±6.1

21.85±3.6

650.00±397.8

5:32±1:52

13.46±2.0

39.96±5.3

10.20±2.2

30.54±6.1

p-value

0.102

0.750

0.211

<0.001*

0.119

0.100

0.059

0.050*

  1. Using one-way ANOVA test across the groups.
  2. Where BMI = body mass index, EBL = estimated intra-operative blood loss, HGB = hemoglobin, HCT = hematocrit.
  3. *Significant at p < 0.05.