Table 1.

Weinstein classification

Stage	Description
I	Normal radiograph. Diagnosis was made at the time of arthroscopy.
II	Minimal joint space narrowing with a concentric head and glenoid.
III	Moderate joint space narrowing with early inferior osteophyte formation.
IV	Severe loss of joint space with osteophyte formation and loss of concentricity between the humeral head and glenoid.

Weinstein classification (Table 1): a classification used specifically for osteoarthritis of the GH joint, based on radiographical features showing damage affecting the joint.