Table 1.

Demographics

N	105 (72 girls)
Median (range of values) age at diagnosis, years	6.9 (2.0–17.6)
Median (range of values) follow-up time, years	10.2 (0.6–15.8)
Diagnosis
JDM	102
Hypomyopathic JDM	1
Overlap myositis	1
Polymyositis	1
Number of Patients with ECG	69
Normal	63
Abnormal	6
Number of Patients with ECHO	52
Normal	26
Abnormal	26