Table 2. Z score formulas for the coronary arteries

	De Zorzi et al. [26]	McCrindle et al. [36]	Olivieri et al. [37]	Dallaire et al. [38]	Kobayashi et al. [39]	Lopez et al. [40]	Yu et al. [42]
Year of publication	1998	2007	2009	2011	2016	2017	2024
Number of subjects	89	221	432	1,036	3,851	3,566	2,030
Country of populations	USA	USA	USA	Canada	Japan	North America	Korea
BSA calculation method	Not stated	Haycock	DuBois	Haycock	Haycock	Haycock	DuBois
Regression method	Linear	Exponential	Logarithmic	Square root	The lambda-mu-sigma	Exponential	Exponential
Values for left circumflex artery	No	No	No	Yes	Yes	No	Yes

AHA: American Heart Association; BSA: body surface area; USA: United States of America.