NEWS: 12-item short forms now available:
KOOS-12 & HOOS-12

Knee injury and Osteoarthritis Outcome Score (KOOS)
Knee injury and Osteoarthritis Outcome Score for Children (KOOS-Child)
Hip disability and Osteoarthritis Outcome Score (HOOS)
Foot and Ankle Outcome Score (FAOS)
Rheumatoid and Arthritis Outcome Score (RAOS)
Hip and Groin Outcome Score (HAGOS)
Neck OutcOme Score (NOOS)
Physical function Short forms
(KOOS-PS and HOOS-PS)