Page 160 - Demo

Chapter 8158Committee Subjective Knee Form (IKDC form)14, the Dutch language version of the ACL Return to Sports after Injury questionnaire (ACL-RSI) 19, and the Knee-Self Efficacy Scale (K-SES).20The IKDC questionnaire measures subjective knee functioning and is scaled from 0-100. A higher score indicates better subjective knee function. The ACL-RSI measures the psychological readiness to return to sports. The outcome is scaled from 0-100 in which higher scores indicate better psychological readiness to return to sports. The KSES questionnaires measures knee self-efficacy, i.e. a person’s belief in their own ability to complete a particular task. Scores are reported from 0-10, in which higher scores indicate better knee self-efficacy. At baseline and 12 months after ACL reconstruction the Tegner Activity Scale8 was completed by the treating physiotherapist to determine the sport activity level of the participants.Strength LSIAt 3,6,9 and 12 months after ACL reconstruction, isometric Quadriceps (Q) and Hamstring (H) strength was measured in Nm/kg using a handheld dynamometer as described by Hansen et al.13 All subjects performed three measurements of both hamstrings and quadriceps strength. To calculate the Q/H ratio the average quadriceps strength was divided by the average hamstring strength. A normal H/Q ratio is considered to be 50% to 80% as averaged through the full range of knee motion, with a higher ratio at faster speeds.18 The strength limb symmetry index (LSI) was also calculated. The operative limb strength average was divided by the non-operative limb strength average, and multiplied by 100 (percentage).Functional LSI At 6, 9 and 12 months after ACL reconstruction, subjects performed a single leg hop for distance, a side jump, a single leg balance test and a Y balance test. To calculate limb asymmetry index values, the operative limb average was divided by the non-operative limb average, and multiplied by 100 (percentage). An average limb symmetry index of the above described three types of test was calculated.Mark Zee.indd 158 03-01-2024 08:56