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Table 3 The actual blood contain of postoperative drainage

From: A randomized controlled trial on the effects of collagen sponge and topical tranexamic acid in posterior spinal fusion surgeries

Variable Group A Group B Group C P
HCT of drainage in POD 1 (%) 21.2 ± 6.1 19.3 ± 6.3 14.2 ± 5.3 P = 0.001
HCT of drainage in POD 2 (%) 11.7 ± 4.5 13.3 ± 4.7 9.6 ± 3.9 P > 0.05
HCT of drainage in POD 3 (%) 6.3 ± 2.1 5.2 ± 1.2 4.9 ± 1.3 P > 0.05
Drainage blood in POD 1 (ml) 137.1 ± 68.6 94.1 ± 52.2 34.8 ± 25.4 P = 0.001
Drainage blood in POD 2 (ml) 23 ± 18 20.6 ± 16.5 15.2 ± 4.5 P > 0.05
Total volume of drainage blood (ml) 160.2 ± 82.8 114.4 ± 60.7 39.9 ± 28.5 P = 0.001