Kellgren-Lawrence
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
K-L
About this calculator
The Kellgren-Lawrence is a classification scale used to evaluate the severity of knee arthritis.
This scale was developed by John Kellgren and John Lawrence and is widely used to classify joint disease into five stages, from stage 0 (no signs of arthritis) to stage 4 (advanced arthritis).
The Kellgren-Lawrence is important for doctors and patients because it helps determine the best therapeutic approach and the prognosis of the disease.
Proper use of the Kellgren-Lawrence can help avoid misdiagnosis and provide adequate treatment for patients with arthritis.
Frequently asked questions
What is the Kellgren-Lawrence scale?
The Kellgren-Lawrence scale is a classification scale used to evaluate the severity of knee arthritis. It is divided into five stages, from stage 0 (no signs of arthritis) to stage 4 (advanced arthritis).
When should I use the Kellgren-Lawrence scale?
The Kellgren-Lawrence scale should be used by doctors to classify the severity of knee arthritis and determine the best therapeutic approach. Patients may also use this scale to understand better the severity of their disease.
What does stage 4 mean in the Kellgren-Lawrence scale?
Stage 4 in the Kellgren-Lawrence scale means advanced arthritis, with significant wear and tear on the cartilage and possible bone damage. In this stage, treatment is generally more invasive and may include surgery.