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Table 1 Evaluation of diagnostic modalities in JDM

From: Diagnostic evaluation and medication usage in a cohort of subjects with juvenile dermatomyositis from the CARRAnet registry

  N (%)
Muscle biopsy (n=89)  
Performed 44 (49.4)
Consistent with JDM 29 (65.9)
EMG (n=86)  
Performed 36 (41.9)
Consistent with JDM 25 (69.4)
MRI (n=87)  
Performed 74 (85.1)
Consistent with JDM 61 (82.4)
Combination of ≥2 studies (n=91)  
Performed 48 (52.7)
2 studies consistent with JDM 26 (54.2)
A study consistent with JDM 22 (45.8)