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The Kellgren-Lawrence classification for osteoarthritis
| Grade of osteoarthritis | Description |
|---|---|
| 0 | No osteoarthritis |
| 1 | Doubtful narrowing of joint space and/or possible osteophytes |
| 2 | Definite osteophytes and possible narrowing of joint space |
| 3 | Multiple osteophytes, definite narrowing of joint space, and some sclerosis and deformity of bone ends |
| 4 | Large osteophytes, marked narrowing of joint space, severe sclerosis, and definite deformity of bone ends |
