A likely front-runner of the the worst named questionnaire ever made, the International Knee Documentation Committee (IKDC) subjectively assesses one's knee based on their symptoms, athletic activity and knee function. It is particularly apt for evaluating knees post-surgery. MCID = 22 points. Cut-offs can potentially identify athletes that fail to return-to-activity 12 months post surgery.

Dataset from:
1. Logerstedt et al. 2014