A multiple linear regression analysis exhibited that fever (β coefficient (95% confidence interval) 2.1 (1.5–2.6)), myalgia (2.5 (2.0–3.1)), massive hemoptysis/alveolar hemorrhage (1.3 (0.4–2.2)), and mononeuritis multiplex (1.2 (0.5–2.0)) independently associated with CRP levels (Supplementary Table S5). Here, CRP is linked to mononeuritis multiplex.