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Table 2 Blood loss after surgery and hemoglobin and hematocrit levels before and after surgery

From: 3-h drain clamping is not effective to reduce total blood loss after primary total knowledge

 3 h drain clamping group
(n = 43)
Control group
(n = 43)
P value
Total drained blood, mL338 ± 190.2839 ± 339.8<0.001
Total blood loss, mL1226.9 ± 488.11127.1 ± 424.50.315
Hidden blood loss, mL893.1 ± 487.7294.7 ± 531.8<0.001
Hemoglobin, g/dL
 Preoperation12.7 ± 1.313.0 ± 1.30.286
 Postoperative 1 day9.7 ± 1.110.2 ± 1.50.216
 Postoperative 2 day8.9 ± 1.09.6 ± 1.40.105
Hematocrit, percentage
 Preoperation36.8 ± 4.137.5 ± 3.60.397
 Postoperative 1 day28.3 ± 3.329.2 ± 3.80.243
 Postoperative 2 day26.6 ± 3.328.1 ± 3.70.061
  1. Normally distributed data given as mean ± standard deviation