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Renal length nomogram in Hong Kong Asian children: sonographic measurement and multivariable approach


Dr. Wing Hang Luk, Department of Diagnostic Radiology and Organ Imaging, United Christian Hospital, HKSAR, B1/F, Block S, United Christian Hospital, 130 Hip Wo Street, Kwun Tong, 999077 Kowloon, Hong Kong. Fax: (0852) 3513 5637; email:


Aim:  The purpose of our study was to build a multiple renal length nomogram for Hong Kong Asian children based on normal renal ultrasonography.

Methods:  All children below the age of 13 years, who underwent ultrasonography in a local Hospital in Hong Kong from 23 September 2008 to 31January 2009 due to melamine exposure were identified.

Results:  A total of 3031 normal children were identified. Hong Kong Asian children have smaller kidneys as compared with the Western. Age, body weight and body height are the significant factors in the multiple nomogram model of renal length. The interaction between body ln(weight) (ln stands for natural logarithm) and age as well as body height and age are also significant in the model.

Conclusion:  Our study provides a practical multiple nomogram of renal length for Hong Kong Asian children.