Table 3.

The different influencing factors on kidney length pole to pole, cortical and parenchymal width in multivariate regression models

Right side	Factor	β	P value	Step of entry
Kidney length (pole to pole)	Height	0.35	<0.001	1
	BMI	0.22	<0.001	2
	Stenosis of renal arteries	-0.15	<0.001	3
	Male gender	0.2	<0.001	4
	Cranial position	0.16	<0.001	5
	Ventral position	-0.157	<0.001	6
	Absence of left kidney	0.102	<0.001	7
	Parapelvic cysts	0.09	= 0.001	8
Cortical width	Male gender	0.123	<0.002	3
	Age	-0.114	= 0.001	2
	BMI	0.105	= 0.002	1
	Caudal position	-0.084	= 0.019	7
	Stenosis of renal arteries	-0.074	= 0.024	5
	Absence of left kidney	0.71	= 0.021	4
	Parapelvic cysts	-0.071	= 0.022	6
	Number of renal arteries	0.069	= 0.026	8
Parenchymal width	Male gender	0.22	<0.001	1
	BMI	0.15	<0.001	3
	Height	0.12	<0.001	2
	Ventral position	-0.1	= 0.005	4
	Parapelvic cysts	-0.1	<0.001	5
	Caudal position	-0.09	= 0.005	7
	Absence of the left kidney	0.084	= 0.004	6
	Age	-0.73	= 0.026	8
Left side	Factor	β	P value	Step of entry
Kidney length (pole to pole)	Height	0.34	<0.001	1
	BMI	0.19	<0.001	2
	Male gender	0.17	<0.001	5
	Ventral position	-0.14	<0.001	6
	Cranial position	0.13	<0.001	7
	Absence of right kidney	0.1	<0.001	4
	Number of renal arteries	0.1	<0.001	3
	Stenoses of renal arteries	-0.07	= 0.01	8
	Previous infarction	-0.07	= 0.014	9
Cortical width	BMI	0.152	<0.001	3
	Age	-0.151	<0.001	2
	Male gender	0.142	<0.001	1
	Absence of the right kidney	0.079	= 0.012	4
Parenchymal width	BMI	0.19	<0.001	1
	Height	0.17	<0.001	2
	Male gender	0.14	<0.001	3
	Age	-0.14	<0.001	4
	Absence of the right kidney	0.11	<0.001	5
	Stenosis of a renal artery	-0.09	= 0.003	6
	Constriction of the left renal vein in the aortomesenteric angle	-0.08	= 0.012	7