BUP 3019 X-Ray Grading System
Osteoarthritis Severity Grades for Knee, His and Spine Joints
Subjects are required to have radiographic evidence of Grade 2-4 osteoarthritis of the hip, knee or spine. The scale used for assessing OA, described below, must be applied to a radiograph of the joint (Standing position required for knee. Supine for Hip.)
Knee and Spine Joints (Standing Knee)
0 Normal
1 Doubtful narrowing of joint space and possible osteophyte lipping
2 Definite osteophytes and possible narrowing of joint space
3 Moderate multiple osteophytes, definite narrowing of joint space and some sclerosis and some sclerosis and possible deformity of bone ends
4 Large osteophytes, marked narrowing of joint space, severe sclerosis and definite deformity of bone ends
Hip Joint (Supine Hip)
0 Normal
1 Possible narrowing
2 Definite narrowing of joint space inferiorly, definite osteophytes and slight sclerosis
3 Marked narrowing of joint space, slight osteophytes, some sclerosis and cyst formation and deformity of femoral head and acetabulum
4 Gross loss of joint space with sclerosis and cysts, marked deformity of femoral head and acetabulum and large osteophytes
Adapted from the Council for International Organizations of Medical Sciences 1963