Table 1.

Demographic and clinical features of dermatomyositis and polymyositis patients

Groups	Number	Gender (male/female), n	Age (years)	Symptom duration (months)	MW (+/−), n	CK (2–200 U/L)	LDH (100–240 U/L)	EMG (+/−), n
DM	12	6/6	38.92 ± 18.33	7.87 ± 6.48	12/0	2231.58 ± 1991.15	591.50 ± 392.46	9/3
PM	10	4/6	37.50 ± 17.35	4.55 ± 3.91	10/0	2030.30 ± 1349.57	796.50 ± 572.89	9/1

DM: Dermatomyositis; PM: Polymyositis; MW: Muscle weakness; CK: Creatine kinase; LDH: Lactate dehydrogenase; EMG: Electromyography; +: Positive; −: Negative.