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Table 2 Clinical results of all patients undergoing medial UKAs in the two groups

From: Comparison of the therapeutic effect between the simultaneous and staged unicompartmental knee arthroplasty (UKA) for bilateral knee medial compartment arthritis

Item

Group A (n = 39)

Group B (n = 54)

t/χ2

P Value

Amount of drainage (mL)

490.3 ± 101.2

460.9 ± 124.8

1.211

0.229

Haemoglobin (g/L)

 Pre-operation

135.3 ± 8.5

132.3 ± 11.8

1.373

0.173

 3-days after operation

106.9 ± 13.8

126.2 ± 8.4

7.734

P < 0.01

Blood transfusion (n, %)

1 (2.6%)

0

Fisher

0.419*

Length of stay (days)

4.2 ± 0.7

7.5 ± 1.5

14.192

P < 0.01

Hospital costs (RMB)

75849.8 ± 1358.9

86271.2 ± 2725.3

24.236

P < 0.01

Duration of anesthesia (min)

120.2 ± 9.7

141.6 ± 8.7

11.008

P < 0.01

Complication (n, %)

4 (10.3%)

5 (9.3%)

0.012

0.913

 Cardiac complications

0

0

  

 Deep infection

0

0

  

 Confusion

0

0

  

 Stroke

0

0

  

 Superficial infection

1

1

  

 Minor wound dehiscence

2

1

  

 Skin edge necrosis

0

1

  

 Respiratory

1

2

  

 Deep-vein thrombosis

0

0

  

 Pulmonary embolism

0

0

  

 Death

0

0

  
  1. *Fisher’s exact test