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Table 1 Sample characteristics of TMJs with and without a clinical diagnosis of ‘arthralgia coexistant with DDwoR’

From: Condylar erosion is predictive of painful closed lock of the temporomandibular joint: a magnetic resonance imaging study

MRI Variable TMJ side with ‘arthralgia and DDwoR’ (n = 62) TMJ side without ‘TMJ pain and dysfunction’ (n = 62) Total (n = 124) P Value
Disk displacement
 Disk displacement with reduction (n) (%) 9 (14.5) 23 (37.1) 32 (25.8) <  0.001a
 Disk displacement without reduction (n) (%) 44 (71.0) 20 (32.3) 64 (51.6) <  0.001a
Osteoarthrosis
 Subchondral sclerosis (n) (%) 32 (51.6) 31 (50.0) 63 (50.8) 0.857a
 Osteophyte (n) (%) 19 (30.6) 15 (24.2) 34 (27.5) 0.421a
 Condylar Erosion (n) (%) 37 (59.7) 13 (21.0) 50 (40.3) <  0.001a
Disk displacement and condylar erosion
 Disk displacement with reduction and condylar erosion (n) (%) 2 (3.2) 2 (3.2) 4 (3.2) 1.000a
 Disk displacement without reduction and condylar erosion (n) (%) 35 (56.5) 11 (17.7) 46 (37.1) <  0.001a
  1. TMJ: temporomandibular joint, DDwoR: disk displacement without reduction, MRI: magnetic resonance imaging, (%): percent, n: number of TMJs, a based on chi-squared test, P: probability of typ I error