Table IV.
Patient-reported outcome measures for patients who underwent primary total knee arthroplasty (primary diagnosis of osteoarthritis).
| Question | Preoperative (n = 8,299) | Postoperative (n = 4,982) | Mean difference (95% CI) | p-value |
|---|---|---|---|---|
| EQ-5D-5L mobility, n (%) | ||||
| No problems | 499 (6.0) | 2,599 (52.2) | < 0.001* | |
| Slight problems | 1,507 (18.2) | 1,485 (29.8) | ||
| Moderate problems | 3,844 (46.4) | 692 (13.9) | ||
| Severe problems | 2,374 (28.6) | 198 (4.0) | ||
| Unable to do | 68 (0.8) | 8 (0.2) | ||
| EQ-5D-5L personal care, n (%) | ||||
| No problems | 4,849 (58.5) | 4,008 (80.6) | < 0.001* | |
| Slight problems | 1,928 (23.3) | 744 (15.0) | ||
| Moderate problems | 1,260 (15.2) | 173 (3.5) | ||
| Severe problems | 224 (2.7) | 38 (0.8) | ||
| Unable to do | 27 (0.3) | 12 (0.2) | ||
| EQ-5D-5L usual activities, n (%) | ||||
| No problems | 1,062 (12.8) | 2,528 (50.9) | < 0.001* | |
| Slight problems | 2,233 (27.0) | 1,658 (33.4) | ||
| Moderate problems | 3,347 (40.4) | 603 (12.1) | ||
| Severe problems | 1,396 (16.9) | 132 (2.7) | ||
| Unable to do | 245 (3.0) | 50 (1.0) | ||
| EQ-5D-5L pain/discomfort, n (%) | ||||
| No pain | 182 (2.2) | 1,505 (30.3) | < 0.001* | |
| Slight pain | 1,382 (16.7) | 2,363 (47.6) | ||
| Moderate pain | 4,010 (48.4) | 882 (17.8) | ||
| Severe pain | 2,331 (28.1) | 190 (3.8) | ||
| Extreme pain | 376 (4.5) | 27 (0.5) | ||
| EQ-5D-5L anxiety/depression, n (%) | ||||
| Not anxious or depressed | 4,307 (52.0) | 3,696 (74.4) | < 0.001* | |
| Slightly anxious or depressed | 2209 (26.7) | 836 (16.8) | ||
| Moderately anxious or depressed | 1371 (16.6) | 328 (6.6) | ||
| Severely anxious or depressed | 297 (3.6) | 82 (1.7) | ||
| Extremely anxious or depressed | 93 (1.1) | 23 (0.5) | ||
| Mean EQ VAS (SD) | 69.2 (18.6) | 79.7 (15.8) | 10.5 (10.0 to 11.0) | < 0.001† |
| Mean Lower Back Pain (SD) | 3.4 (3.0) | 2.7 (3.0) | -0.6 (-0.7 to -0.5) | < 0.001† |
| Mean Affected Joint Pain (SD) | 6.7 (2.1) | 2.3 (2.4) | -4.4 (-4.5 to -4.4) | < 0.001† |
| Mean Oxford Knee Score (SD) | 22.0 (8.3) | 37.6 (8.0) | 15.6 (15.3 to 15.8) | < 0.001† |
| Mean KOOS-12 Pain Score (SD) | 39.3 (17.1) | 76.9 (19.2) | 37.7 (36.9 to 38.4) | < 0.001† |
| Mean KOOS-12 Function Score (SD) | 44.7 (19.4) | 80.8 (16.7) | 36.1 (35.3 to 36.8) | < 0.001† |
| Mean KOOS-12 Quality of Life Score (SD) | 30.5 (17.8) | 70.8 (20.5) | 40.3 (39.5 to 41.1) | < 0.001† |
| Mean KOOS-12 Summary Score (SD) | 38.2 (16.3) | 76.2 (17.3) | 38.0 (37.3 to 38.7) | < 0.001† |
| Expected mobility, n (%) | ||||
| No problems | 4,734 (57.8) | |||
| Slight problems | 2,518 (30.8) | |||
| Moderate problems | 689 (8.4) | |||
| Severe problems | 210 (2.6) | |||
| Unable to do | 35 (0.4) | |||
| Mean Expected Joint Pain (SD) | 2.1 (2.6) | |||
| Mean Expected Health (SD) | 84.5 (16.0) | |||
| Procedure satisfaction, n (%) | ||||
| Very satisfied | 2,828 (57.4) | |||
| Satisfied | 1,153 (23.4) | |||
| Neutral | 430 (8.7) | |||
| Dissatisfied | 212 (4.3) | |||
| Very dissatisfied | 304 (6.2) | |||
| Joint change, n (%) | ||||
| Much better | 4,020 (81.6) | |||
| A little better | 523 (10.6) | |||
| About the same | 185 (3.8) | |||
| A little worse | 121 (2.5) | |||
| Much worse | 77 (1.6) |
*
Chi-squared test.
†
Logistic regressionn analysis.
CI, confidence interval; EQ-5D-5L, EuroQol five-dimension five-level questionnaire; KOOS, Knee disability and Osteoarthritis Outcome Score; SD, standard deviation; VAS, visual analogue scale.