Table 5. Correlation between serum LIGHT levels and other disease activity indicators of DM-IP.

Variables	Correlation R	Analysis P
CK	0.19	0.41
LD	0.45	0.04*
CRP	0.58	0.006*
KL–6	0.27	0.24
Ferritin	0.25	0.27
AaDO2	0.37	0.10
%VC	0.41	0.12
%Dlco	0.55	0.03*
Total GGO score	0.72	0.0002*

DM: dermatomyositis; IP: interstitial pneumonia; CK: creatine kinase; LD: lactate dehydrogenase; CRP: C-reactive protein; AaDO₂: alveolar-arterial oxygen difference; VC: vital capacity; Dlco: diffusion capacity of the lung for carbon monoxide; GGO: ground-glass opacity; R: correlation coefficient established using Spearman correlation coefficients.

*P < 0.05.