Table 1 Levels of radiographic knee osteoarthritis according to the Kellgren and Lawrence scale
From: Radiographic knee osteoarthritis in ex-elite table tennis players
Stage | Kellgren & Lawrence criteria | Ex-elite table tennis players (n = 22) | Control subjects (n = 22) |
|---|---|---|---|
0 | Normal | 5 (22.7%) | 14 (63.7%) |
1 | Doubtful narrowing of joint space and possible osteophytic lipping | 5 (22.7%) | 7 (31.7%) |
2 | Definite osteophytes and possible narrowing of JS | 6 (27.3%) | 1 (4.5%) |
3 | Moderate multiple osteophytes, definite narrowing of JS, some sclerosis and possible deformity of bone contour | 5 (22.7%) | 0 |
4 | Large osteophytes, marked narrowing of JS, severe sclerosis, and definite deformity of bone contour | 1 (4.6%) | 0 |