Table of Hamada et al for the Upper Limit of Normal for the Common Bile Duct By Age in the Japanese

Hamada et al reported the upper limit of normal for the common bile duct in a Japanese population. The authors are from multiple hospitals in Japan.

Analysis: inner diameter of the most dilated part of the common bile duct in millimeters using non-pressure imaging

Age in Years	Upper Limit of Normal by Ultrasonography
0 to 7 years	(0.1714 * (age)) + 3.0
7 to 19 years	(0.1 * (age)) + 3.5
20 to 70 years, using INT((age)/10)	(0.04286 * ((INT((age)/10)))^2) + (0.12 * (INT((age)/10))) + 5.517

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