Parameter	Score
Limp (5 points)	None = 5. Slightly or periodically = 3. Constant = 0.
Support (5 points)	Full support without pain = 5. Painful = 3. Weight-bearing impossible = 0.
Walking (5 points)	Unlimited = 5. More than 2 km = 3. 1–2 km = 2. Unable = 0.
Stairs (10 points)	No difficulty = 10. Slight pain when descending = 8. Pain both when descending and ascending = 5. Unable = 0.
Squatting (5 points)	No difficulty = 5. Repeated squatting painful = 4. Painful each time = 3. Possible with partial weight bearing = 2. Unable = 0.
Running (10 points)	No difficulty = 10. Pain after more than 2 km = 8. Slight pain from start = 6. Severe pain = 3. Unable = 0.
Jumping (10 points)	No difficulty = 10. Slight difficulty = 7. Constant pain = 2. Unable = 0.
Prolonged sitting with the knees flexed (10 points)	No difficulty = 10. Pain after exercise = 8. Constant pain = 6. Pain forces to extend knees temporarily = 4. Unable = 0.
Pain (10 points)	None = 10. Slight and occasional (8). Interferes with sleep = 6. Occasionally severe = 3. Constant and severe = 0.
Swelling (10 points)	None = 10. After severe exertion = 8. After daily activities = 6. Every evening = 4. Constant = 0.
Abnormal painful patellar movements (10 points)	None = 10. Occasionally in sports activities = 6. Occasionally in daily activities = 4. At least one documented dislocation = 2 points. More than two dislocations = 0.
Atrophy of thigh (5 points)	None = 5. Slight = 3. Severe = 0.
Flexion deficiency (5 points)	None = 5. Slight = 3. Severe = 0.
Total score is out of 100 (100 being the highest possible score).