Table 3 Ceiling and floor effects within 12 months after total knee arthroplasty
FJS, % (n) | WOMAC, % (n) | P value | |
|---|---|---|---|
Ceiling | |||
3 months (n = 84) | |||
Maximum | 1.2 (1) | 0 (0) | 1 |
Highest 10% | 2.4 (2) | 7.1 (6) | 1 |
Highest 15% | 7.1 (6) | 11.9 (10) | 0.148 |
6 months (n = 56) | |||
Maximum | 5.4 (3) | 1.8 (1) | 0.045* |
Highest 10% | 10.7 (6) | 16.1 (9) | 0.046* |
Highest 15% | 19.6 (11) | 32.1 (18) | 0.027* |
12 months (n = 23) | |||
Maximum | 8.7 (2) | 8.7 (2) | 0.170 |
Highest 10% | 13.0 (3) | 30.4 (7) | 0.209 |
Highest 15% | 26.1 (6) | 39.1 (9) | 0.162 |
Total (n = 163) | |||
Maximum | 3.1 (5) | 1.8 (3) | 0.003* |
Highest 10% | 6.7 (11) | 13.5 (22) | 0.001* |
Highest 15% | 14.1 (23) | 22.7 (37) | <0.001* |
Floor | |||
3 months (n = 84) | |||
Minimum | 6.0 (5) | 0 (0) | 0.061 |
Lowest 10% | 16.7 (14) | 0 (0) | <0.001* |
Lowest 15% | 21.4 (18) | 0 (0) | <0.001* |
6 months (n = 56) | |||
Minimum | 5.4 (3) | 0 (0) | 0.248 |
Lowest 10% | 10.7 (6) | 0 (0) | 0.030* |
Lowest 15% | 10.7 (6) | 0 (0) | 0.030* |
12 months (n = 23) | |||
Minimum | 0 (0) | 0 (0) | 1.000 |
Lowest 10% | 4.3 (1) | 0 (0) | 1.000 |
Lowest 15% | 13.0 (3) | 0 (0) | 0.248 |
Total (n = 163) | |||
Minimum | 4.9 (8) | 0 (0) | 0.007* |
Lowest 10% | 12.9 (21) | 0 (0) | <0.001* |
Lowest 15% | 16.6 (27) | 0 (0) | <0.001* |