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Group 1 Group 2 Subgroup 1PD Subgroup 1TS Subgroup 2PD Subgroup 2TS Total 30 27 28 25 Age 53.8±16.5 54.6±11.2 55.8±9.6 57.9±15.6 Sex Male, 24; Female, 6 Male, 11; Female, 16 Male, 20; Female, 8 Male, 14; Female, 11 Histology type Aggressive hemangioma 0 4 (3.6%) 0 3 (2.7%) Renal cell carcinoma 22 (20%) 13 (11.8%) 16 (14.6%) 5 (4.5%) Multiple mieloma 8 (7.3%) 4 (3.6%) 12 (10,9%) 8 (7.3%) Plasmacytoma 0 6 (5.5%) 0 9 (8.2%) Location Thoracic spine 15 22 18 19 Lumbar spine 15 5 10 6 Procedure Method Angiography + embolization Gelatin-thrombin matrix Operation Laminectomy Spondylectomy Laminectomy Spondylectomy Subgroup 1PD Subgroup 2PD p-value Subgroup 1TS Subgroup 2TS p-value Blood loss (ml) 1175±330 1557±672 0.139 3012±780 3262±864 0.042* Drainage loss (ml) 968±411 464±127 0.008* 1223±511 983±331 0.045* Operative time (min) 176±33 184±26 0.203 340±73 334±46 0.205 Hemoglobin level Preoperative (g/dL) 13.65±0.84 13.32±0.94 0.342 13.6±1.42 13.56±0.96 0.081 1 day postoperative (g/dL) 10.78±1.4 10.04±1.93 0.265 10.83±1.72 11.96±1.21 0.092 1 week postoperative (g/dL) 12.01±1.21 12.04±1.04 0.934 11.23±1.29 12.1±0.54 0.07 ↵* Significant difference between groups
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