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A good system for evaluating the degree of impairment, disability, and handicap of the patient with a cruciate ligament injury includes functional score, activity grading, stability testing, and measurements of performance and strength, all of which are relevant to different aspects of knee function. The symptom-related knee score gives a more differentiated picture of the disability than does a binomial rating of symptoms. A way of grading the disability in an objective way is to use a performance test. This test could also be used for monitoring rehabilitation before full activity has been resumed. The activity grading scale is very useful for grading the handicap.
Tegner et al. (Fri,) studied this question.