Page 166 - Demo

Chapter 8164has shown a mean KSES score at 7-12 months after surgery from 7.5 [95% CI 6.8–8.2]. We have seen excellent outcome scores on the KSES score in our KROS group [9.3 at 12 months]. The major increment in subjective knee symptoms, psychological readiness to return to sports and knee selfefficacy was seen from baseline to 6 months after surgery.Webster et al also tested a large cohort for a functional limb symmetry using the single hop for distance and the crossover hop 12 months after surgery which led to a LSI of 94 and 96% respectively.21 In our population we have seen comparable results with a functional LSI of 94% in the KROS group. In terms of quadriceps strength a LSI 101% (SD 9) was observed in the KROS group. Arundele et al. reported a quadriceps strength LSI of 101% (SD 14) in 40 patients 12 months after surgery,4 which is again comparable to our results. We observed that over time, the quadriceps strength in the KROS group increased well. Hamstring strength seemed to dip around month 9, but this was also seen in the regular rehabilitation group. This supports the fact that return to sports after 9 months is too early. It could be, that after these ‘disappointing’ results after 9 months compared to the measurement after 6 months, participants have become extra motivated to work on the quadriceps and hamstring strength. We had no influence on, nor restricted, any training done in addition to the specified ice skating programme. This may have led to some bias in the results.Overall we have observed no differences in development of strength or performance on hop tests during the course of the rehabilitation between the KROS group and the regular rehabilitation group. Even though this was not the main purpose of the study and baseline characteristics differ between the two groups, this pilot study shows that it seems that the KROS protocol is not inferior to the gold standard. A non-inferiority study is needed to confirm our preliminary data. For now, these results underline the feasibility of the KROS rehabilitation programme. Mark Zee.indd 164 03-01-2024 08:56