Table 3.
Proportion of OKS (Kalairajah et al. classification)
| Factor | TKR (n = 19,358) | UKR (n = 19,358) | |
|---|---|---|---|
| n (%) | n (%) | p-value | |
| Preoperative OKS categorisation | |||
| Poor | 14,244 (74) | 14,391 (74) | 0.5 |
| Fair | 3,780 (20) | 3,820 (20) | 0.7 |
| Good | 1,223 (6) | 1,070 (6) | 0.002 |
| Excellent | 111 (0) | 77 (0) | 0.01 |
| Postop OKS categorisation: | |||
| Poor | 3,115 (16) | 2,538 (13) | < 0.001 |
| Fair | 3,071 (16) | 2,356 (12) | < 0.001 |
| Good | 6,200 (32) | 5,442 (28) | < 0.001 |
| Excellent | 6,972 (36) | 9,022 (47) | < 0.001 |
Comparisons between implant types were performed using the chi-square proportional test.