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Table 2 Comparison of Blood Loss, LOS and expenses

From: The efficacy and safety of tranexamic acid for reducing blood loss following simultaneous bilateral total knee arthroplasty: a multicenter retrospective study

Variable IV group
(n = 192)
Combined group
(n = 135)
Control group
(n = 248)
P P1 P2 P3
TBL (mL) 1061.1 ± 689.6 988.3 ± 559.3 1685.0 ± 571.4 0.006* 0.693 0.003* 0.003*
Transfusion rate 27 (14.1%) 15 (11.1%) 57 (23.0%) 0.005* 0.818 0.018* 0.005*
Drain volume 432.9 ± 262.6 393.2 ± 250.3 663.9 ± 199.4 < 0.001* 0.348 0.005* < 0.001*
Maximum Hb drop 28.8 ± 14.5 28.5 ± 13.4 33.4 ± 14.0 0.015* 0.710 0.025* 0.016*
Maximum Hct drop 0.082 ± 0.056 0.074 ± 0.053 0.131 ± 0.049 0.001* 0.614 0.001* < 0.001*
LOS 7.8 ± 6.6 7.7 ± 4.8 10.1 ± 3.8 0.781 < 0.001* < 0.001* < 0.001*
Expenses ∆ 93,625.8 ± 16,516.4 94,255.1 ± 10,453.5 99,174.1 ± 14,032.7 0.005* 0.676 0.005* 0.006*
  1. TBL Total blood loss, Hb Hemoglobin, Hct Hematocrit, POD postoperative day. LOS: length of stay; P represents P value of IV vs combined vs control group, P1 represents P value of IV vs combined group, P2 represents P value of IV vs control group, P3 represents P value of combined vs control group
  2. ∆ Results were presented as Chinese yuan
  3. *Significant difference
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