Location of osteophyte(s) | Radiographic view | x Ray severity* | No (%) of knees (n=180)† | |
---|---|---|---|---|
Contralateral | Index | |||
*Most severe grade of OA severity, based on standardised pictorial atlases15,16 ; | ||||
†total of percentages may not add to 100% because of rounding off error; | ||||
‡in the absence of a definite osteophyte elsewhere in the PF joint, a grade 1 osteophyte on the superior or inferior pole of the posterior aspect of the patella16 was not accepted as evidence of definite OA. Spurs at the superior or inferior pole of the anterior patella were considered to reflect enthesopathy rather than osteophytosis. | ||||
Tibiofemoral compartment | ||||
Medial/lateral margins | Semiflexed AP | 0 | 98 (54) | 34 (19) |
1 | 73 (41) | 96 (53) | ||
2 | 8 (4) | 47 (26) | ||
3 | 1 (1) | 3 (2) | ||
Posterior tibia | Lateral | 0 | 149 (83) | 142 (79) |
1 | 19 (11) | 12 (7) | ||
2 | 5 (3) | 17 (9) | ||
3 | 7 (4) | 9 (5) | ||
Any TF location | Either view | ⩾1 | 94 (52) | 147 (82) |
Patellofemoral compartment | ||||
Medial/lateral margins | Hughston | 0 | 62 (34) | 45 (25) |
1 | 77 (43) | 72 (40) | ||
2 | 35 (19) | 57 (32) | ||
3 | 6 (3) | 6 (3) | ||
Superior/inferior poles | Lateral | 0 | 68 (38) | 48 (27) |
1 | 90 (50) | 88 (49) | ||
2 | 22 (12) | 42 (23) | ||
3 | 0 (0) | 2 (1) | ||
Any PF location | Either view | ⩾1‡ | 121 (67) | 142 (79) |
Any TF or PF location | Any view | ⩾1‡ | 148 (82) | 170 (94) |