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Table 1 Frequency of MRI-detected cartilage damage (WORMS grade ≥ 2) in the patellofemoral joint stratified by the presence of MRI-detected mediopatellar plica

From: Prevalence of MRI-detected mediopatellar plica in subjects with knee pain and the association with MRI-detected patellofemoral cartilage damage and bone marrow lesions: data from the Joints On Glucosamine study

Compartment Total Without mediopatellar plica With mediopatellar plica
All types Type A Type B Type C
(N = 342) (N = 179) N = 163 N = 76 N = 69 N = 18
Medial patella 212 (62.0%) 104 (58.1%) 108 (66.3%) 44 (57.9%) 55 (79.7%) 9 (50.0%)
Lateral patella 141 (41.2%) 80 (44.7%) 61 (37.4%) 19 (25.0%) 30 (43.5%) 12 (66.7%)
Anterior medial femur 136 (39.8%) 67 (37.4%) 69 (42.3%) 28 (36.8%) 33 (47.8%) 8 (44.4%)
Anterior lateral femur 90 (26.3%) 49 (27.4%) 41 (25.2%) 15 (19.7%) 20 (29.0%) 6 (33.3%)