Table 1

Osteoarthritis grading system for joint space narrowing, osteophytes, and sclerosis

Joint space narrowing
 0 no narrowing
1 mild or doubtful narrowing (<33%)
2 moderate narrowing (34–66%)
3 severe narrowing (>66% but no complete narrowing)
4 complete narrowing (100%)
Osteophytes ( acetabulum and/ or femoral head)
0 no osteophyte
1 mild osteophyte
2 moderate osteophyte
3 large osteophyte
Sclerosis
0 no or doubtful sclerosis
1 evidence of sclerosis