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Table 2 The compartment of clinical indicators before and after surgery

From: Delayed drainage versus autotransfusion drainage and routine drainage after total knee arthroplasty: a comparative study

Group

Postoperative hemoglobin (g/L)

Drainage volume (mL)

Number of allogeneic blood transfusion

Maximum postoperative body temperature

Upper patellar diameter difference before and after surgery (cm)

Joint motion (degree)

First day

Third day

Seventh day

Routine drainage (n = 18)

81.33 ± 9.86

666.1 ± 155.0

8

37.26 ± 0.55

36.89 ± 0.66

36.79 ± 0.53

2.56 ± 1.20

110.56 ± 11.36

Blood transfusion (n = 25)

91.96 ± 9.57**

799.2 ± 196.7*

4*

37.70 ± 0.53**

37. 31 ± 0.44*

37.09 ± 0.37*

2.68 ± 1.10

108.00 ± 11.27

Delayed drainage (n = 18)

91.50 ± 7.92**

381.7 ± 129.2**

2*

37.27 ± 0.41

36.67 ± 0.47

36.67 ± 0.48

2.33 ± 0.89

107.50 ± 10.77

Statistics

F = 7.616

F = 24.167

χ2 = 5.087

F = 4.953

F = 6.834

F = 7.616

F = 0.406

F = 0.365

P value

0.001

0.000

0.079

0.011

0.002

0.001

0.669

0.696

  1. Compared with routine drainage group, *p < 0.05, **p < 0.01. Compared with blood transfusion group p < 0.05, p < 0.01.