A comparative study of established z score models for coronary artery diameters in 181 healthy Korean children.
10.3345/kjp.2017.60.11.373
- Author:
Kyungguk RYU
1
;
Jeong Jin YU
;
Hyun Ok JUN
;
Eun Jung SHIN
;
Young Hee HEO
;
Jae Suk BAEK
;
Young Hwue KIM
;
Jae Kon KO
Author Information
1. Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. jjyu@amc.seoul.kr
- Publication Type:Comparative Study ; Original Article
- Keywords:
z score;
Coronary artery diameters;
Korean children;
Kawasaki disease
- MeSH:
Anatomic Variation;
Asian Continental Ancestry Group;
Child*;
Coronary Vessels*;
Echocardiography;
Humans;
Mucocutaneous Lymph Node Syndrome
- From:Korean Journal of Pediatrics
2017;60(11):373-378
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: The aim of this study was to investigate the statistical properties of four previously developed pediatric coronary artery z score models in healthy Korean children. METHODS: The study subjects were 181 healthy Korean children, whose age ranged from 1 month to 15 years. The diameter of each coronary artery was measured using 2-dimensional echocardiography and converted to the z score in the four models (McCrindle, Olivieri, Dallaire, and Japanese model). Descriptive statistical analyses and 1-sample t tests were performed. RESULTS: All calculated z scores had P values of ≥0.050 using the Kolmogorov-Smirnov test. The one sample t test showed that the mean z scores did not converge to zero except in 1 model, and the mean right coronary artery (RCA) z score was less than zero in all 4 models. The smaller RCA diameter in this study could be associated with the more distal measuring point used to avoid the conal branch. The percentage of subjects with extreme z score values (≥2.0 and ≥2.5) for the left main coronary artery (LMCA) seems to be higher in the Dallaire (4.9% and 3.3%) and Japanese models (7.1% and 3.8%). CONCLUSION: All 4 models showed statistical feasibility of normal distribution. More precise instructions would be needed for the measurement of the RCA. The higher percentage of extreme z scores for the LMCA is compatible with the basic understanding of anatomic variation in the LMCA.
