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Table 3 Sample characteristics of TMJs with and without MRI findings of condylar erosion

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

Variable TMJ sides with condylar erosion (n = 50) TMJ sides without condylar erosion (n = 74) Total (n = 124) P Value
Clinical Variable
 Age (years) (mean ± SD) 40.1 (14.0) 32.8 (12.7) 35.7 (13.6) 0.003a
 Sex (n) (% female) 46 (92.0) 67 (90.5) 113 (91.1) 0.779b
 Time since pain onset (weeks) (mean ± SD) 10.3 (11.1) 3.8 (7.2) 6.7 (9.9) < 0.001a
 Pain intensity (mm) (mean ± SD) 36.4 (32.2) 17.3 (27.2) 25.1 (30.6) < 0.001a
MRI Variable
 Disk displacement with reduction (n) (%) 4 (8.0) 28 (37.8) 32 (25.8) 0.001b
 Disk displacement without reduction (n) (%) 46 (92.0) 18 (24.3) 64 (51.6) 0.001b
  1. TMJ: temporomandibular joint, MRI: magnetic resonance imaging, SD: standard deviation, (%): percent, n: number of TMJs, abased on independent samples t-test, bbased on chi-squared test, probability of typ I error