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Table 2 Blood loss and transfusion requirement

From: Temporary clamping of drain combined with tranexamic acid reduce blood loss after total knee arthroplasty: a prospective randomized controlled trial

Values Group A Group B Group C Group D p-value
  (n = 60) (n = 60) (n = 60) (n = 60)  
Volume of drained blood 1182 ± 411 724 ± 246 821 ± 337 526 ± 222 < 0.001a
(ml)* (420–2260) (230–1330) (230–2020) (180–960)  
Decreasing Hb at 12 hours 3.3 ± 0.9 2.1 ± 0.6 2.8 ± 0.8 1.8 ± 0.7 < 0.05b
(g/dl)* (1.3-5.3) (0.9-3.8) (0.9-4.4) (0.4-3.6)  
Number of patients requiring blood transfusion 53 (88.3%) 34 (56.7%) 49 (81.7%) 23 (38.3%) < 0.05c
PRC transfusion (unit)* 1.8 ± 1.0 0.7 ± 0.7 1.3 ± 0.9 0.4 ± 0.5 < 0.05d
  (0–4) (0–2) (0–3) (0–2)  
  1. * Data was presented as mean ± standard deviation and range.
  2. a Statistical difference among all groups (except between group B and C, p = 0.37).
  3. b Statistical difference among all groups (except between group B and D, p = 0.07).
  4. c Statistical difference among all groups (except between group A and C, B and D).
  5. d Statistical difference among all groups (except between group A and C, p = 0.05).
  6. Hb = hemoglobin, PRC = packed red cell.