Table 1 Baseline demographics for the propensity score matched study population
Pre-match | Post-match | |||||||
|---|---|---|---|---|---|---|---|---|
1:4 | HD (21 knees) | non-HD (706 knees) | p-value | Standardized difference | HD (21 knees) | non-HD (71 knees) | p-value | Standardized difference |
Age | 66.9 ± 9.3 | 73.4 ± 8.6 | 0.001 | 0.124 | 66.9 ± 9.3 | 68.5 ± 12.2 | 0.312 | 0.033 |
Gender (Female) | 17 (81.0) | 569 (80.6) | 1.000 | 0.009 | 17 (81.0) | 58 (81.7) | 1.000 | 0.0189 |
BMI (kg/m2) | 22.74 ± 4.85 | 25.78 ± 3.95 | 0.001 | 0.164 | 22.74 ± 4.85 | 23.48 ± 4.44 | 0.446 | 0.044 |
Preoperative Hb | 11.88 ± 1.35 | 12.54 ± 1.42 | 0.004 | 0.074 | 11.88 ± 1.35 | 11.81 ± 1.45 | 0.849 | 0.007 |
Preoperative Plt | 21.25 ± 6.05 | 21.90 ± 6.6 | 0.829 | 0.041 | 21.25 ± 6.05 | 21.80 ± 8.17 | 0.919 | 0.034 |
Preoperative Alb | 3.74 ± 0.32 | 3.98 ± 0.38 | 0.002 | 0.084 | 3.74 ± 0.32 | 3.732 ± 0.48 | 0.685 | 0.002 |
Preoperative AKSS Knee score | 44.9 ± 18.8 | 46.2 ± 16.0 | 0.760 | 0.037 | 44.9 ± 18.8 | 46.6 ± 16.7 | 0.787 | 0.049 |
Preoperative AKSS Function score | 30.7 ± 20.9 | 41.5 ± 19.9 | 0.018 | 0.328 | 30.7 ± 20.9 | 33.0 ± 21.4 | 0.562 | 0.084 |
Osteoarthritis | 14 (66.7) | 617 (87.4) | 0.014 | 0.508 | 14 (66.7) | 47 (66.2) | 1.000 | 0.010 |
Rheumatoid arthritis | 6 (28.6) | 74 (10.5) | 0.021 | 0.469 | 6 (28.6) | 20 (28.2) | 1.000 | 0.009 |
Osteonecrosis | 1 (4.8) | 10 (1.4) | 0.277 | 0.194 | 1 (4.8) | 4 (5.6) | 1.000 | 0.039 |
Post-traumatic arthritis | 0 (0.0) | 5 (0.7) | 1.000 | 16.724 | 0 (0.0) | 0 (0.0) | N/A | N/A |
Post-osteotomy arthritis | 0 (0.0) | 4 (0.6) | 1.000 | 18.678 | 0 (0.0) | 0 (0.0) | N/A | N/A |
Diabetes mellitus | 5 (23.8) | 114 (16.2) | 0.366 | 0.192 | 5 (23.8) | 17 (23.9) | 1.000 | 0.003 |
Hypertension | 8 (38.1) | 381 (54.0) | 0.184 | 0.323 | 8 (38.1) | 23 (32.4) | 0.612 | 0.120 |
Cancer | 1 (4.8) | 53 (7.5) | 1.000 | 0.115 | 1 (4.8) | 4 (5.6) | 1.000 | 0.039 |
Stroke | 1 (4.8) | 63 (8.9) | 1.000 | 0.165 | 1 (4.8) | 1 (1.4) | 0.406 | 0.195 |
Cardiac disease | 3 (14.3) | 107 (15.2) | 1.000 | 0.025 | 3 (14.3) | 7 (9.8) | 0.690 | 0.136 |
Chronic respiratory disease | 1 (4.8) | 5 (0.7) | 0.162 | 0.250 | 1 (4.8) | 3 (4.2) | 1.000 | 0.026 |
Psychiatric disease | 0 (0.0) | 19 (2.7) | 1.000 | 8.506 | 0 (0.0) | 0 (0.0) | N/A | N/A |
Spinal disease | 2 (9.5) | 51 (7.2) | 0.661 | 0.083 | 2 (9.5) | 5 (7.0) | 0.657 | 0.090 |
Osteoporosis | 2 (9.5) | 32 (4.5) | 0.257 | 0.196 | 2 (9.5) | 5 (7.0) | 0.657 | 0.090 |
Venous thromboembolism | 0 (0.0) | 1 (0.1) | 1.000 | 37.770 | 0 (0.0) | 0 (0.0) | N/A | N/A |
Chronic liver disease | 1 (4.8) | 28 (4.0) | 0.580 | 0.039 | 1 (4.8) | 5 (7.0) | 1.000 | 0.097 |
Anemia | 6 (28.6) | 87 (12.3) | 0.041 | 0.411 | 6 (28.6) | 21 (29.6) | 1.000 | 0.022 |