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Table 1 Demographic date

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
N 40 40 40  
Age (year) 57.4 ± 10.7 58 ± 12.3 53.1 ± 12 P > 0.05
Sex
 Males 13 18 19 P > 0.05
 Females 27 22 21 P > 0.05
BMI (kg/cm2) 24.9 ± 3.9 25 ± 3.3 25.6 ± 2.8 P > 0.05
Preoperative HGB (g/l) 126.8 ± 8.6 123.4 ± 10.3 139.4 ± 13.6 P > 0.05
Surgical level 2.31 ± 0.09 2.76 ± 0.12 2.40 ± 0.10 P > 0.05
Operative time (min) 144.5 ± 40.2 128 ± 40.9 121 ± 19.1 P > 0.05
Intra-operative blood loss (ml) 190 ± 123.2 223.8 ± 163 176 ± 100.5 P > 0.05
Mean duration of hospital stay (days) 7.82 ± 1.2 6.09 ± 1.3 6.13 ± 1.3 P = 0.001
Number of transfusion 12 3 3 P = 0.001