Table 5.

Reference curves for kidney structures: equations for the mean and SD of each measurement, based on age in exact weeks. Gender = 0 for boys and gender = 1 for girls. Age defined as post-conceptional age (weeks)

Kidney measurement	Measurement	Regression equation
Left kidney
Length (mm)	Mean
	SD
Width (mm)	Mean
	SD
Depth (mm)	Mean
	SD
Volume (cm3)	Mean
	SD
Right kidney
Length (mm)	Mean
	SD
Width (mm)	Mean
	SD
Depth (mm)	Mean
	SD
Volume (cm3)	Mean
	SD