A Clinical Analysis of Risk Factors for Interstitial Lung Disease in Patients with Idiopathic Inflammatory Myopathy

Table 2

The constituent ratio of three subtypes of IIM with ILD.

Subtypes	With ILD	Without ILD	Chi-square value	𝑃 value
PM	36 (62.1%)	22 (37.9%)	1.3*	0.26
DM	30 (51.7%)	28 (48.3%)	10.6**	<0.05
ADM	17 (94.4%)	1 (5.6%)	6.8***	<0.05

∗PM versus DM, **DM versus ADM, and ***ADM versus PM
IIM: idiopathic inflammatory myopathies; ILD: interstitial lung disease; PM: polymyositis; DM: dermatomyositis; ADM: amyopathic dermatomyositis.