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Table 2 Comparison of Patient Characteristics, and Preoperative Variables 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
ASA score 1.5 ± 0.5 1.5 ± 0.5 1.5 ± 0.5 0.617 0.012 0.723
 1–2 51 (85.0%) 64 (81.0%) 51 (72.9%)    
 3–4 9 (15.0%) 15 (19.0%) 19 (27.1%)    
BMI 27.35 ± 3.64 27.19 ± 3.82 26.84 ± 3.61 0.125 0.007 0.932
 Normal (< 25) 21 (35.0%) 28 (35.5%) 26 (37.1%)    
 Overweight (25–30) 30 (50.0%) 31 (39.2%) 30 (42.9%)    
 Obese (> 30) 9 (15.0%) 20 (25.3%) 14 (20.0%)    
Anesthesia
 General 1 (1.7%) 2 (2.5%) 10 (14.3%)    
 Spine 59 (98.3%%) 77 (97.5%) 60 (85.7%)    
 Hypertension 35 (58.3%) 48 (60.7%) 57 (81.4%)* 8.192 / 0.036
 Diabetes 18 (30.0%) 24 (30.4%) 19 (27.1%) 0.663 / 0.792
 Coronary heart disease 14 (23.3%) 19 (24.1%) 20 (28.5%) 0.386 / 0.697
 Digestive diseases 5 (8.3%) 7 (8.8%) 7 (10.0%) 0.286 / 0.711
 Nervous system disease 6 (10.0%) 9 (11.4%) 12 (17.1%) 2.861 / 0.323
 Immune system disease 1 (1.7%) 2 (2.5%) 0 2.102 / 0.283
 Respiratory diseases 2 (3.3%) 3 (3.8%) 7 (10.0%) 3.287 / 0.113
 Peripheral vascular disease 1 (1.7%) 2 (2.5%) 6 (8.5%) 1.983 / 0.204
 Coagulation abnormalities 8 (13.3%) 12 (15.2%) 11 (15.7%) 0.582 / 0.841
  1. “*” Represent compared with the Group 1and 2, the difference in Group 3 is statistically different