Croft’s modification of the Kellgren and Lawrence grading system (“Croft grade”)
| Grade | Description |
|---|---|
| JSN, joint space narrowing; MJS, minimal joint space; OA, osteoarthritis. | |
| 0 | No change |
| 1 | Definite osteophytes only |
| 2 | JSN only (defined as an MJS of ⩽2.5 mm) |
| 3 | Presence of two of the following: JSN, osteophytosis, subchondral sclerosis (of ⩾5 mm), cyst formation |
| 4 | Presence of three of the following: JSN, osteophytosis, subchondral sclerosis (of ⩾5 mm), cyst formation |
| 5 | Same as grade 4, but with deformity of the femoral head or total hip replacement due to OA (verified by record view) |