• Inter-Rater Reliability
• Movements Video-Analysis Test (MAT)

Introduction
In many team sports, anterior cruciate ligament (ACL) injuries are unfortunately common, with the majority requiring reconstructive surgery and extensive rehabilitation before athletes can returns to preinjury level.
Study purpose and hypothesis
We decided to evaluate the reliability of the 2D video-analysis method (MAT test), between different testers, to check the applicability of the test.
As such, the evaluation of the inter-rater reliability of 1) total score, 2) movements sub-scores and 3) criteria sub-score is the primary and only purpose of our study.
Material and methods
We enrolled 34 patients (18 male and 16 female) who are all athletes, from different disciplines (football, rugby, futsball, basketball, running), with moderate/high sport level, evaluated with Tegner’s score scale. The test entails a frontal and lateral evaluation of the above-listed six movements with a pre-fixed motion analysis system, consisting of three high speed cameras (Vicon Bonita Video, Vicon Motion Systems Ltd UK) and one piezoeletric force platform (Optima 400*600 Advanced Mechanical Technology, Inc., USA). The software used for the analysis was Vicon Nexus 12.0 (Vicon Motion Systems Ltd UK).
Results
The inter-rater reliability was excellent, with an ICC of 0.92 (0.83-0.96). All the ICC for sub-scores were in range of adequate to excellent agreement between testers.
Conclusion
We found that a 2D six movements analysis test has a excellent inter-rater reliability (ICC 0.92) and therefore may be applied to rate patient movements. The reliability of movement screening tests have been previously studied for the promising impact that this kind of tests can have in the clinical practice.