Characteristics of z score systems for diagnosing coronary abnormalities in Kawasaki disease

Because of the various body sizes of children with Kawasaki disease (KD), coronary artery diameter requires normalization to the body surface area as a z score. In updated guidelines, coronary artery abnormalities are important criteria in the diagnosis of KD, and z score systems have been accepted to define coronary artery abnormalities. However, the z score formula should be selected carefully because each yields different results.