Oxford Knee Score
Oxford Knee Score (OKS) is a short questionnaire patients complete to report how their knee is doing after knee replacement. It helps measure the outcome from the patient’s view and has also been used for other knee treatments.
The OKS has 12 questions about knee pain and how well the knee works in daily life. It was created by researchers at the University of Oxford and surgeons at the Nuffield Orthopaedic Centre. It is short, practical, reliable, valid, and sensitive to important changes over time.
Ownership and management: Isis Outcomes, part of Isis Innovation Ltd, supports the OKS for the University of Oxford.
Scoring: There are two common scoring methods:
- Method 1: Each question is scored 1 to 5 (1 = least difficult, 5 = most difficult). The 12 answers add up to a total of 12 to 60. In this system, a lower total score means a better knee outcome.
- Method 2: Each question is scored 0 to 4, giving a total of 0 to 48. In this system, a higher total score means better knee function.
Both methods are valid. Always state which scoring system you used to avoid confusion.
This page was last edited on 2 February 2026, at 13:27 (CET).