Table 2.
Means ± SD of interlimb difference scores and lower (LB) and upper bounds (UB) of 95% confidence interval (CI) of interlimb differences (value of operated − nonoperated limb) of medial and lateral UKA groups
| Variable | MED-UKA (n = 17) | LAT-UKA (n = 9) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Interlimb difference | Frequency | 95% CI | Interlimb difference | Frequency | 95% CI | |||||
| OP > non-OP | OP < non-OP | OP > non-OP | OP < non-OP | |||||||
| LB | UB | LB | UB | |||||||
| Stance phase (% total stride time) | 1 ± 3 | 4 | 0 | −0.4 | 2.5 | 0 ± 3 | 0 | 1 | −1.9 | 2.7 |
| Swing phase (% total stride time) | −1 ± 3 | 3 | 0 | −2.5 | 0.4 | 0 ± 3 | 2 | 1 | −2.7 | 1.9 |
| Extension displacement (degrees) | −1.5 ± 4.7 | 3 | 4 | −3.9 | 0.9 | 2.4 ± 5.4 | 3 | 0 | −1.7 | 6.5 |
| Flexion displacement (degrees) | −1.9 ± 5.9 | 1 | 5 | −4.9 | 1.2 | 1.6 ± 4.7 | 3 | 1 | −2.0 | 5.2 |
| Adduction displacement (degrees) | 1.7 ± 7.2 | 5 | 4 | −2.0 | 5.4 | −2.4 ± 5.6 | 0 | 4 | −6.8 | 1.9 |
| Abduction displacement (degrees) | 0.8 ± 8.2 | 5 | 5 | −3.4 | 5.0 | −1.7 ± 9.4 | 2 | 3 | −8.9 | 5.5 |
| Internal rotation displacement (degrees) | −0.4 ± 4.3 | 3 | 2 | −2.6 | 1.8 | −1.5 ± 5.5 | 1 | 2 | −5.7 | 2.7 |
| External rotation displacement (degrees) | −1.1 ± 6.1 | 3 | 5 | −4.3 | 2.1 | −3.7 ± 9.4 | 2 | 3 | −10.9 | 3.5 |
The frequency of participants who displayed a clinically meaningful interlimb difference (5% stride time for temporal variables and 5° for angular kinematic variables) is presented by the limb that displayed the greater magnitude; MED-UKA = medial unicompartmental knee arthroplasty; LAT-UKA = lateral unicompartmental knee arthroplasty; OP = operated limb; non-OP = the nonoperated limb.