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Table 4 Summary of enhancement ratios and relative signal intensity changes for condylar enhancement

From: MRI thresholds for discrimination between normal and mild temporomandibular joint involvement in juvenile idiopathic arthritis

Enhancement ratio Mean 95 % confidence interval P value (RC) P value (NRC) P value (NRC 1.5 T) P value (NRC 3.0 T)
Non-rheumatologic control (48) 0.138 −0.063 – 0.339 1.00 -
Rheumatologic control (66) 0.112 0.011 – 0.213 1.00 0.06 0.16
Mild (53) 0.592 0.380 – 0.804 0.0008 0.005 0.96 <0.0001
Moderate/severe (15) 1.284 0.827 – 1.740 <0.0001 <0.0001 0.007 <0.0001
Relative signal intensity change Mean 95 % confidence interval P value (RC) P value (NRC) P value (NRC 1.5 T) P value (NRC 3.0 T)
Non–rheumatologic control (48) 0.588 0.391 – 0.785 <0.0001
Rheumatologic control (66) 0.008 −0.097 – 0.113 <0.0001 0.01 <0.0001
Mild (53) 0.470 0.267 – 0.673 0.001 1.00 1.00 0.26
Moderate/severe (15) 0.951 0.542 – 1.360 <0.0001 0.35 0.07 0.51
  1. The P values represent comparisons between TMJs with mild or moderate/severe condylar enhancement (based on qualitative assessment) and the results from the rheumatologic (RC) and non-rheumatologic control groups (NRC). The non-rheumatologic control group was further separated into MRI examinations that were performed under 1.5 T and 3.0 T. Further comparison is made between the two subgroups and the TMJs of JIA patients. The number in () represents the number of TMJs in each group