Table 7

 The Kellgren and Lawrence grading system

Hips classified as grade 2 or more were defined as having osteoarthritis.
0No osteoarthritis
1DoubtfulPossible narrowing of joint space medially and possible osteophytes around the femoral head; or osteophytes alone
2MildDefinite narrowing of joint space inferiorly, definite osteophytes, and slight sclerosis
3ModerateMarked narrowing of joint space, definite osteophytes, some sclerosis and cyst formation, and deformity of the femoral head and acetabulum
4SevereGross loss of joint space with sclerosis and cysts, marked deformity of femoral head and acetabulum and large osteophytes