Table 4.
Comparison of pre-operative and post-operative patient reported outcome measure scores: Total knee replacement vs total hip replacement
|
|
TKR (n = 63), median (IQR)
|
THR (n = 68), median (IQR)
|
P value1
|
Z value
|
U value
|
|
| KOOS/HOOS pain |
Pre-operative | 36 (25-44) | 33 (25-40) | 0.597 | -0.528 | 1755 |
| Post-operative | 92 (77-98) | 95 (84-100) | 0.208 | -0.370 | 1206 | |
| KOOS/HOOS symptoms |
Pre-operative | 36 (21-46) | 38 (30-49) | 0.415 | -0.415 | 1729 |
| Post-operative | 89 (82-93) | 90 (80-100) | 0.629 | -0.483 | 1189 | |
| KOOS/HOOS ADL |
Pre-operative | 38 (31-44) | 37 (26-43) | 0.298 | -1.040 | 1656 |
| Post-operative | 88 (78-97) | 91 (76-98) | 0.711 | -0.370 | 1206 | |
| KOOS/HOOS Sport/Rec | Pre-operative | 5 (0-25) | 19 (6-31) | 0.030a | -2.164 | 1001 |
| Post-operative | 70 (50-86) | 75 (56-100) | 0.158 | -0.141 | 738 | |
| KOOS/HOOS QoL | Pre-operative | 13 (6-25) | 19 (6-31) | 0.106 | -1.616 | 1519 |
| Post-operative | 75 (56-93) | 84 (58-94) | 0.499 | -0.676 | 1030 | |
| KOOS/HOOS overall | Pre-operative | 28.9 (18.2-37.9) | 28.0 (21.0-37.6) | 0.833 | -0.211 | 1267 |
| Post-operative | 80.7 (64.5-89.4) | 88.8 (72.9-95.5) | 0.140 | -1.476 | 713 | |
| WOMAC pain | Pre-operative | 40 (30-50) | 40 (30-49) | 0.984 | -0.02 | 1886 |
| Post-operative | 90 (80-100) | 95 (85-100) | 0.297 | -1.04 | 1020 | |
| WOMAC stiffness | Pre-operative | 25 (25-37.5) | 25 (25-50) | 0.583 | -0.55 | 1786 |
| Post-operative | 75 (63-100) | 88 (75-100) | 0.309 | -1.02 | 1114 | |
| WOMAC function | Pre-operative | 38.2 (30.9-44.1) | 36.8 (28.3-44.1) | 0.639 | -0.47 | 1798 |
| Post-operative | 91.2 (77.9-97.1) | 91.9 (75.7-98.5) | 0.945 | -0.07 | 1151 | |
| OKS/OHS | Pre-operative | 15 (11-19) | 14 (10-20) | 0.859 | -0.177 | 1826 |
| Post-operative | 40 (33-43) | 42 (35-47) | 0.076 | -1.775 | 932 | |
| EQ-5D index | Pre-operative | 0.345 (0.211-0.548) | 0.335 (0.169-0.533) | 0.719 | -0.36 | 1761 |
| Post-operative | 0.821 (0.703-1) | 0.857 (0.643-1) | 0.386 | -0.87 | 988 | |
| EQ-5D VAS | Pre-operative | 65 (50-80) | 65 (50-80) | 0.308 | -1.02 | 1579 |
| Post-operative | 83 (71-95) | 90 (79-95) | 0.374 | -0.89 | 1019 | |
| SF-12 PCS | Pre-operative | 27.6 (23.2-32.1) | 24.8 (21.7-29.3) | 0.073 | -1.79 | 1308 |
| Post-operative | 43.8 (33.0-50.4) | 50.6 (36.5-55.0) | 0.106 | -1.62 | 690 | |
| SF-12 MCS | Pre-operative | 47.0 (39.3-56.5) | 49.6 (39.9-58.3) | 0.777 | -0.28 | 1574 |
| Post-operative | 58.6 (51.5-61.3) | 57.8 (55.4-59.8) | 0.438 | -0.78 | 784 | |
1
Mann-Whitney U test.
a
Statistically significant P < 0.05.
IQR: Interquartile range; TKR: Total knee replacement; THR: Total hip replacement; KOOS: Knee Osteoarthritis Outcome Score; HOOS: Hip Osteoarthritis Outcome Score; ADL: Activities of daily living; Sport/Rec: Sports and recreation; QoL: Quality of life; OKS: Oxford Knee Score; OHS: Oxford Hip Score; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; EQ-5D: EuroQol-5D index; VAS: Visual Analogue Scale; SF-12: Short form 12 item survey; PCS: Physical component summary; MCS: Mental component summary.