• Jeong Jin Yu, Hee Joung Choi, Hwa Jin Cho, Sung Hye Kim, Eun Jung Cheon, Gi Beom Kim, Lucy Youngmin Eun, Se Yong Jung, Hyun Ok Jun, Hyang-Ok Woo, Sin-Ae Park, Soyoung Yoon, Hoon Ko, Ji-Eun Ban, Jong-Woon Choi, Min Seob Song, and Ji Whan Han.
• Department of Pediatrics, University of Ulsan College of Medicine, Seoul, Korea. jjyu@amc.seoul.kr.
• J. Korean Med. Sci. 2024 Apr 29; 39 (16): e144e144.

BackgroundThis study aimed to generate a Z score calculation model for coronary artery diameter of normal children and adolescents to be adopted as the standard calculation method with consensus in clinical practice.MethodsThis study was a retrospective, multicenter study that collected data from multiple institutions across South Korea. Data were analyzed to determine the model that best fit the relationship between the diameter of coronary arteries and independent demographic parameters. Linear, power, logarithmic, exponential, and square root polynomial models were tested for best fit.ResultsData of 2,030 subjects were collected from 16 institutions. Separate calculation models for each sex were developed because the impact of demographic variables on the diameter of coronary arteries differs according to sex. The final model was the polynomial formula with an exponential relationship between the diameter of coronary arteries and body surface area using the DuBois formula.ConclusionA new coronary artery diameter Z score model was developed and is anticipated to be applicable in clinical practice. The new model will help establish a consensus-based Z score model.© 2024 The Korean Academy of Medical Sciences.

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