Figure 4From: Effectiveness of tranexamic acid in reducing blood loss in spinal surgery: a meta-analysis The amount of blood transfusion was significantly less in the TXA group compared with the placebo group (weighted mean difference, -234.61 ml [95% CI, -383.23 to -85.99 ml]; p = 0.002). TXA = tranexamic acid, SD = standard deviation, IV = inverse variance, and df = degrees of freedom.Back to article page