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Table 3 Comparison of postoperative variables and Perioperative complications between different groups

From: Patient outcomes in Anteromedial osteoarthritis patients over 80 years old undergoing Oxford Unicompartmental knee Arthroplasty in China

Variable Group 1 Group 2 Group 3 F value/χ2 η2 P Value
Hospital stay (d) 10.54 ± 3.37 11.23 ± 2.82 12.64 ± 2.68 1.276 0.009 0.387
Tourniquet time (min) 72.50 ± 6.57 75.16 ± 9.53 76.23 ± 11.18 1.785 0.012 0.204
Changes of hemoglobin (g/L) 14.11 ± 7.48 15.29 ± 9.39 13.05 ± 8.69 0.967 0.026 0.458
Blood loss volume (ml) 178.17 ± 74.73 179.80 ± 84.22 175.50 ± 80.39 0.641 0.034 0.783
Preoperative ROM 111.91 ± 11.57 108.83 ± 10.84 103.86 ± 10.68 0.884 0.075 0.539
Postoperative ROM 120.23 ± 7.99 115.38 ± 8.27 112.95 ± 7.01 0.923 0.115 0.413
Perioperative complications
 Myocardial infarction 0 0 0    
 Congestive heart failure 1 (1.6%) 0 0 0.598 / 0.567
 Cerebrovascular accident 0 0 0    
 Lung infection 1 (1.6%) 1 (1.2%) 2 (2.9%) 0.682 / 0.542
 Pulmonary embolism 0 0 0    
 Urinary system infection 0 0 0    
 Abnormal renal and liver function 2 (3.3%) 4 (5.1%) 0 3.117 / 0.195
 Deep vein thrombosis 3 (5.0%) 5 (6.3%) 5 (7.1%) 0.265 / 0.838
 Calf muscular vein thrombosis 9 (15.0%) 14 (17.7%) 13 (18.5%) 0.386 / 0.643
 Hypoproteinemia 8 (13.3%) 9 (11.4%) 11 (15.7%) 1.487 / 0.455
 Superficial infection 1 (1.6%) 1 (1.2%) 11 (15.7%)* 11.248 / 0.015
 Deep infection 0 0 0    
 Swelling of the wound 4 (6.6%) 5 (6.3%) 12 (17.1%)* 10.749 / 0.023
  1. “*” Represent compared with the Group 1and 2, the difference in Group 3 is statistically different