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Knee Rehabilitation on Skates1598Statistical analysisStatistical analysis was performed using SPSS (v 28; IBM Corp, Armonk, NY, USA). Descriptive statistics (means, SD, range) were applied for baseline characteristics, loss of compliance and overall patient reported rating of the rehabilitation programme. QQ plots were conducted for all variables and no signs of non-normality were shown. To compare means of strength and functional outcomes between the KROS group and the groups that received regular rehabilitation, independent sample t-tests were used (two-sided, equal variances assumed). Statistical tests deemed significant if P <0.05.ResultsIn total 15 participants were recruited. Due to interference of the COVID pandemic during the period of this study, only five subjects were able to follow the ice skate part of the KROS programme. This group of subjects was referred to as the “KROS group”. The other ten subjects were rehabilitated according to the routine ACL rehabilitation protocol: the “Regular Rehabilitation Group”. Baseline characteristics of both groups are presented in table 2. As seen in table 2 there are distinct differences between the two groups. The KROS group consisted of more male participants, which is also reflected by the biometric parameters length and weight. The ACL-RSI, IKDC and KSES-scores were lower in the KROS group at baseline, but this was not significantly different from the regular rehabilitation group. Overall, three participants decided to discontinue their participation in the study, one in the KROS group, two in the regular rehabilitation group. Reasons varied but were mainly related to personal circumstances. All other participants were present during all scheduled training sessions or rescheduled their training session in case of absence. This led to a total loss of compliance of 20% in both groups. The KROS rehabilitation programme was rated with a 6.8 on a scale from 0 to 10. No serious adverse events were recorded during this study. Mark Zee.indd 159 03-01-2024 08:56