CRP and Arthritis: The univariable analyses indicated that arthritis/arthralgia (54.2% versus 17.6%, P < 0.05), Mechanic's hand (16.9% versus 2.0%, P < 0.05), Raynaud's phenomenon (36.1% versus 2.0%, P < 0.05), heliotrope rash (44.6% versus 19.6%, P < 0.05), fever (43.4% versus 21.6%, P < 0.05), elevated ESR (60.2% versus 35.3%, P < 0.05), elevated CRP (55.4% versus 31.4%, P < 0.05), or anti-Jo-1 antibody (20.5% versus 5.9%, P < 0.05) were risk factors for developing ILD in IIM.