CRP and interstitial lung disease: Patients with PM/DM-ILD had older age (55.61 vs 49.00 years, p = 0.022), longer disease duration (8.00 vs 2.00 months, p = 0.005), and higher levels of CRP (7.32 vs 1.21 mg/ml, p = 0.012) than PM/DM-non-ILD patients (Table 4A).