KOOS is an abbreviation of 'Knee and Osteoarthritis Outcome Score', which is a 'quality of life' scoring system for knee problems.
The KOOS scoring system has just under 50 questions, which attempt to identify where the patient currently sits in respect of their symptoms, function and quality of life.
Quality of Life score
A 'quality of life' scoring system evaluates the extent to which a knee problem is affecting the person's life, and is used for assessing outcomes after several types of knee injury and osteoarthritis.
Knee and Osteoarthritis Outcome Score