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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

ItemGroup A (n = 39)Group B (n = 54)t/χ2P Value
Amount of drainage (mL)490.3 ± 101.2460.9 ± 124.81.2110.229
Haemoglobin (g/L)
 Pre-operation135.3 ± 8.5132.3 ± 11.81.3730.173
 3-days after operation106.9 ± 13.8126.2 ± 8.47.734P < 0.01
Blood transfusion (n, %)1 (2.6%)0Fisher0.419*
Length of stay (days)4.2 ± 0.77.5 ± 1.514.192P < 0.01
Hospital costs (RMB)75849.8 ± 1358.986271.2 ± 2725.324.236P < 0.01
Duration of anesthesia (min)120.2 ± 9.7141.6 ± 8.711.008P < 0.01
Complication (n, %)4 (10.3%)5 (9.3%)0.0120.913
 Cardiac complications00  
 Deep infection00  
 Confusion00  
 Stroke00  
 Superficial infection11  
 Minor wound dehiscence21  
 Skin edge necrosis01  
 Respiratory12  
 Deep-vein thrombosis00  
 Pulmonary embolism00  
 Death00  
  1. *Fisher’s exact test
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