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Table 2 The information 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
Volume of drainage in POD 1 (ml) 232.8 ± 75.9 175.6 ± 76.8 90.9 ± 49.8 P = 0.001
Volume of drainage in POD 2 (ml) 74.1 ± 32.8 57.3 ± 34.5 41.1 ± 23 P = 0.001
Total volume of drainage (ml) 301.3 ± 110.9 232.8 ± 98 131.9 ± 78 P = 0.001