Data shown are real case number or mean±SD.

Normal values: White blood cell counts (WBC):4-10×10⁹/L; Erythrocyte sedimentation rate (ESR): 0-20mm/h; C-reactive protein (CRP):0-5 mg/L; N-terminal pronatriuretic peptide (NT-proBNP): <300pg/ml; IgG: 7–16 g/L; IgM: 0.7–4.6 g/L; IgA:0.4–2.3 g/L; Complement component 3(C3):0.80-1.40g/L; Complement 4(C4): 0.20-0.70g/L;ND: not determined. HC, healthy control; CAL-KD, Coronary Artery Lesions Kawasaki disease. *P<0.05 vs HC; ^#P<0.05 vs. NCAL-KD .