Table 2 Comparison between study centers
From: Better short-term function after unicompartmental compared to total knee arthroplasty
Center A | Center B | Center C | p-value | |
|---|---|---|---|---|
Demographic findings | ||||
gender | ||||
Female | 12 | 32 | 11 | 0.210 |
Male | 22 | 27 | 13 | |
age | 59.5 (53.0; 64.2) | 65.0 (60.5.; 73.6) | 61.5 (56.2; 64.7) | 0.001* |
BMI | 28.9 (27.4; 32.8) | 29.4 (26.9; 31.9) | 29.1 (26.7; 33.0) | 0.976 |
Cut-sew time | 78.5 (72.0; 84.0) | 72.0 (68.0; 76.0) | 60.0 (60.0; 60.0) | < 0.01* |
Radiographic findings | ||||
Mechanical alignment (− Varus, + Valgus) | −4.0 (−5.0; − 2.6) | −2.7 (− 3.9; − 1.3) | − 4.8 (− 7.4, − 3.4) | 0.019 |
Anatomical axis (neutral = 186°) | 182.1 (181; 183.4) | 183.3 (182.1; 184.7) | 181.2 (178.6; 182.6) | 0.019 |
Medial proximal tibia angle (MPTA) | 86.6 (84.6; 88.6) | 87.5 (86.3; 89.0) | 86.3 (85.6; 88.0) | 0.105 |
Posterior Tibial Slope | 86.8 (85.2; 88.6) | 83.8 (81.7: 85.0) | 87.2 (84.9; 81.7) | < 0.01 |
Patient reported outcome | ||||
Knee Society Score | ||||
Knee Score | ||||
1 years | 88.5 (75.0; 93.0) | 90.0 (86.0; 94.0) | 88.0 (75.0; 95.0) | 0.414 |
2 years | 90.0 (80.0; 94.0) | 92.0 (86.0; 95.0) | 86.5 (73.0; 94.0) | 0.048* |
Function Score | ||||
1 year | 100 (90.0; 100) | 97.5 (80.0; 100) | 90.0 (80.0; 100) | 0.513 |
2 years | 100 (90.0; 100) | 90.0 (80.0; 100) | 100.0 (90.0; 100) | 0.054 |
Total Knee Score | ||||
1 year | 177.5 (165.0; 192.0) | 185.5 (161.0; 191.0) | 184.0 (168.0; 186.0) | 0.584 |
2 years | 182.5 (179.0; 193.0) | 183.0 (166.0; 191.0) | 178.0 (163.0; 194.0) | 0.512 |
KOOS | ||||
Pain | ||||
1 year | 91.6 (75.0; 97.2) | 88.8 (69.4; 94.4) | 83.3 (77.7; 91.6) | 0.513 |
2 years | 88.8 (72.2; 97.2) | 91.6 (77.7; 97.2) | 77.7 (69.4; 86.1) | 0.054 |
Symptoms | ||||
1 year | 82.1 (67.8; 92.8) | 85.7 (75.0; 92.8) | 78.5 (71.4; 85.7) | 0.197 |
2 years | 82.1 (75.0; 92.8) | 89.2 (78.5; 96.4) | 78.5 (64.2; 89.2) | 0.008* |
Function, daily living (ADL) | ||||
1 year | 92.6 (72.0; 98.5) | 89.7 (72.0; 95.5) | 86.7 (70.5; 92.6) | 0.247 |
2 years | 89.7 (75.0; 98.5) | 91.1 (73.5; 97.0) | 80.8 (72.0; 85.2) | 0.031* |
Function, sports and recreation | ||||
1 year | 50.0 (30.0; 70.0) | 65.0 (35.0; 80.0) | 65.0 (50.0; 80.0) | 0.243 |
2 years | 65.0 (40.0; 75.0) | 65.0 (50.0; 85.0) | 67.5 (55.0; 75.0) | 0.918 |
Quality of Life (QoL) | ||||
1 year | 68.7 (43.7; 87.5) | 71.9 (43.7; 81.2) | 68.7 (50.0; 75.0) | 0.875 |
2 years | 68.7 (50.0; 81.2) | 75.0 (50.0; 93.7) | 68.7 (50.0; 75.0) | 0.368 |
Load pain (VAS) | ||||
1 year | 0.7 (0.0; 3.4) | 1.5 (0.0; 3.0) | 2.0 (1.0; 3.0) | 0.163 |
2 years | 0.4 (0.0; 2.4) | 1.5 (0.0; 2.0) | 2.5 (1.0; 4.0) | 0.007 |
Satisfaction | ||||
1 year | 10 (8.6; 10) | 9.0 (8.0; 10) | 9.0 (7.0: 10) | 0.108 |
2 years | 10 (8.3; 10) | 9.8 (8.5; 10) | 9.0 (8.0;10) | 0.076 |