Table 2.
Details of first-time total knee replacement across three pain phenotypes.
| Class 1 (n = 236) |
Class 2 (n = 193) |
Class 3 (n = 534) |
p * C1 vs. C2 |
p * C1 vs. C3 |
p * C2 vs. C3 |
|
|---|---|---|---|---|---|---|
| Mean time to first-time TKR, years | ||||||
| Right knee | 8.2 ± 3.1 | 6.4 ± 3.8 | 8.9 ± 0.9 | 0.385 | 1.000 | 0.722 |
| Left knee | 7.5 ± 3.8 | 7.4 ± 3.8 | 10.0 ± 3.2 | 1.000 | 0.328 | 0.248 |
| Any knee | 7.7 ± 3.5 | 7.1 ± 3.9 | 9.7 ± 2.9 | 1.000 | 0.419 | 0.133 |
| Number of TKR, n (%) | ||||||
| Right knee | 15 (6) | 23 (12) | 3 (1) | 0.047 | <0.001 | <0.001 |
| Left knee | 14 (6) | 21 (11) | 9 (2) | 0.066 | 0.003 | <0.001 |
| Any knee | 22 (9) | 34 (18) | 11 (2) | 0.012 | <0.001 | <0.001 |
* p values are from post hoc testing for comparisons between classes determined by ANOVA; TKR total knee replacement.