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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.