To assess changes in impedance parameters in Idiopathic Inflammatory Myopathies (IIMs) There are structural and compositional changes in muscles, such as edema, adipose infiltration, and/or atrophy, in IIMs. Electrical impedance myography (EIM) is sensitive to such changes. EIM parameters will be different when compared to healthy controls in IIMs.~To assess whether EIM parameters are reflective of disease severity, based on clinical outcome measures of IIMs.~Clinical outcome measures reflect on disease severity which is an indirect measure of muscle involvement in IIMs. If EIM parameters correlate with clinical outcome measure, it would indirectly prove that EIM can reflect disease severity in IIMs
To assess changes in impedance parameters in Idiopathic Inflammatory Myopathies (IIMs).~To assess whether EIM parameters are reflective of disease severity, based on clinical outcome measures of IIMs.