Table 3. Relative basal parameters for patients with IIM and AVM.

Variables	IIM (n=46)	AVM (n=24)	P value
Relative basal LS	0.39±0.07	0.49±0.08†‡	<0.001
Relative basal MWI	0.44±0.08	0.49±0.10	0.045
Relative basal CW	0.43±0.07	0.54±0.11†‡	<0.001
Relative basal WW	0.98±1.04	0.73±0.46	0.291
Relative basal WE	0.48±0.03	0.50±0.05†	0.013

Values are mean ± SD. ^†, P<0.05 versus PM; ^‡, P<0.05 versus DM. IIM, idiopathic inflammatory myopathies; AVM, acute viral myocarditis; LS, longitudinal strain; MWI, myocardial work index; CW, constructive work; WW, wasted work; WE, work efficiency; PM, polymyositis; DM, dermatomyositis.