Objective: Coronary artery abnormalities (CAA) are critical complication of Kawasaki disease (KD). Several inflammatory biomarkers have been identified for occurrence and progression of KD. Discovering new biomarkers of inflammation becomes important in order to help diagnostic accuracy of CAA and to provide prognostic information for KD. LMR, are simple and inexpensive methods for assessing inflammation, which have been also investigated as predictors of several cancers, cardiovascular and inflammatory diseases. In this study we aimed to investigate whether LMR is a risk factor of CAA of KD.