Liu HH, Qiu Z, Fan GZ, et al. - For clinical decision‐making and long‐term management in Kawasaki disease (KD) patients, there is essentiality of accurate classification of coronary artery abnormalities (CAAs). Researchers here adopted the Japanese Ministry of Health (JMH) criteria and the Z‐score criteria from 2004 American Heart Association guidelines and compared their detective efficacies for CAAs in 251 Chinese patients with KD Z scores were estimated by 6 published methods. Per outcomes, the prevalence of CAAs was underestimated by the JMH criteria vs the Z‐score criteria. Quantitative evaluation of coronary artery luminal dimensions, normalized as Z scores adjusted for body surface, should be recommended. The greater coronary artery luminal dimensions differ, the more heterogeneous Z scores measured by various methods have.