Table VI.
Comparison of pain and oxford scores for each side following total hip arthroplasty and total knee arthroplasty, with correlations for the change in score by KL grade
| KL grade | Side 1 Oxford Hip Score Pain, median (IQR) | Side 1 total Oxford Hip Score, median (IQR) | Side 2 pain score, median (IQR) | Side 2 total pain score, median (IQR) | ||||||||||
| N (%) | Preoperative | One-year | Delta | Preoperative | One-year | Delta | N (%) | Preoperative | One-year | Delta | Preoperative | One-year | Delta | |
| THA | ||||||||||||||
| 1 | 1 (0.8) | 4.0 | 3.0 | 1.0 | 20.0 | 28.0 (28.0 to 28.0) | 8.0 (8.0 to 8.0) | 0 (0.0) | ||||||
| 2 | 50 (41.7) | 5.0 (4.0 to 5.0) | 1.5 (1.0 to 3.0) | 3.0 (2.0 to 4.0) | 12.0 (8.0 to 18.0) | 38.0 (26.8 to 43.3) | 24.5 (11.8 to 31.0) | 60 (50.0) | 5.0 (4.0 to 5.0) | 2.0 (1.0 to 3.0) | 3.0 (2.0 to 3.0) | 14.5 (11.0 to 20.8) | 38.0 (29.0 to 44.8) | 21.0 (14.5 to 28.0) |
| 3 | 51 (42.5) | 5.0 (5.0 to 5.0) | 1.0 (1.0 to 2.0) | 4.0 (3.0 to 4.0) | 11.0 (8.0 to 16.0) | 41.0 (32.0 to 46.0) | 30.0 (21.0 to 34.0) | 45 (37.5) | 5.0 (4.0 to 5.0) | 1.0 (1.0 to 2.0) | 3.0 (3.0 to 4.0) | 15.0 (11.0 to 19.5) | 43.0 (38.0 to 45.0) | 23.0 (20.0 to 31.0) |
| 4 | 18 (15.0) | 5.0 (4.0 to 5.0) | 1.0 (1.0 to 2.0) | 4.0 (3.0 to 4.0) | 11.5 (7.5 to 15.0) | 43.0 (38.5 to 47.0) | 31.0 (25.8 to 34.0) | 15 (12.5) | 5.0 (4.0 to 5.0) | 1.0 (1.0 to 1.0) | 4.0 (2.0 to 4.0) | 11.0 (6.0 to 13.0) | 46.0 (38.0 to 48.0) | 34.0 (24.0 to 37.0) |
| Correlation (KL vs delta) | R = 0.300 p = 0.001 |
R = 0.270 p = 0.003 |
R = 0.250 p = 0.006 |
R = 0.318 p < 0.001 |
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| TKA | ||||||||||||||
| 1 | 3 (2.6) | 5.0 (5.0 to 5.0) | 3.0 (1.0 to 3.0) | 2.0 (2.0 to 2.0) | 16.0 (13.0 to 16.0) | 37.0 (34.0 to 37.0) | 22.0 (18.0 to 22.0) | 2 (1.8) | 5.0 (5.0 to 5.0) | 3.0 (2.0 to 3.0) | 2.0 (1.0 to 2.0) | 12.0 (8.0 to 12.0) | 39.0 (35.0 to 39.0) | 27.0 (27.0 to 27.0) |
| 2 | 27 (23.7) | 5.0 (4.0 to 5.0) | 3.0 (2.0 to 4.0) | 2.0 (1.0 to 3.0) | 13.0 (8.0 to 20.0) | 32.0 (26.0 to 36.0) | 15.0 (8.0 to 25.0) | 30 (26.3) | 5.0 (4.0 to 5.0) | 3.0 (1.0 to 4.0) | 1.0 (0 to 3.0) | 15.0 (11.0 to 21.3) | 29.0 (19.8 to 39.0) | 9.0 (3.8 to 21.0) |
| 3 | 75 (65.8) | 5.0 (4.0 to 5.0) | 2.0 (1.0 to 3.0) | 3.0 (2.0 to 4.0) | 13.0 (9.0 to 17.0) | 36.0 (31.0 to 41.0) | 21.0 (16.0 to 30.0) | 73 (49.3) | 5.0 (4.0 to 5.0) | 2.0 (1.0 to 3.0) | 2.0 (1.0 to 3.0) | 15.0 (10.0 to 21.0) | 37.0 (30.5 to 43.0) | 22.0 (14.0 to 26.0) |
| 4 | 9 (7.9) | 5.0 (4.5 to 5.0) | 2.0 (1.0 to 4.0) | 3.0 (1.0 to 4.0) | 10.0 (5.0 to 12.5) | 35.0 (17.5 to 42.5) | 20.0 (8.0 to 33.0) | 9 (7.9) | 5.0 (4.0 to 5.0) | 3.0 (1.0 to 4.0) | 2.0 (1.0 to 3.0) | 12.0 (8.0 to 19.0) | 37.0 (25.5 to 42.5) | 22.0 (10.0 to 29.5) |
| Correlation (KL vs delta) | R = 0.181 p = 0.054 |
R = 0.199 p = 0.034 |
R = 0.195 p = 0.038 |
R = 0.257 p = 0.006 |
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*
Pain analyzed using Spearman Rank coefficient. Oxford score correlation calculated using Pearson correlation coefficient.
IQR, interquartile range; KL, Kellgren and Lawrence; THA, total hip arthroplasty; TKA, total knee arthroplasty.