Table 2.

Univariate and multivariate logistic regression analysis of risk factors for lymph node metastasis in patients with renal cell cancer.

Characteristics	Univariate logistic			Multivariable logistics
	OR	CI	P	OR	CI	P
Age	1.01	1.01-1.02	<0.001	1.00	0.99-1.00	0.134
Grade
Well-differentiated	Ref	Ref	Ref	Ref	Ref	Ref
Moderately differentiated	2.07	1.27-3.37	0.003	1.46	0.89-2.4	0.136
Poorly differentiated	12.68	7.92-20.3	<0.001	4.35	2.69-7.04	<0.001
Undifferentiated; anaplastic	40.12	25.03-64.31	<0.001	5.36	3.29-8.73	<0.001
unknown	20.8	13.04-33.18	<0.001	5.54	3.44-8.95	<0.001
Liver. metastasis
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	16.32	14.2-18.77	<0.001	1.59	1.35-1.87	<0.001
Unknown	10.52	5.93-18.65	<0.001	1.17	0.62-2.2	0.622
M
M0	Ref	Ref	Ref	Ref	Ref	Ref
M1	21.77	19.9-23.82	<0.001	7.92	6.88-9.11	<0.001
Primary.Site
C64.9-Kidney	Ref	Ref	Ref	Ref	Ref	Ref
C65.9-Renal pelvis	3.94	3.49-4.44	<0.001	3.33	2.83-3.92	<0.001
Pulmonary. metastasis
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	14.96	13.63-16.42	<0.001	1.12	0.98-1.28	0.108
T
T1	Ref	Ref	Ref	Ref	Ref	Ref
T2	6.37	5.52-7.36	<0.001	2.48	2.09-2.93	<0.001
T3	10.34	9.21-11.6	<0.001	3.73	3.25-4.29	<0.001
T4	46.45	39.7-54.34	<0.001	6.89	5.68-8.35	<0.001
TX	26.04	21.35-31.77	<0.001	3.75	2.98-4.73	<0.001
Tumor.Size	1.02	1.02-1.02	<0.001	1.00	1.00-1.00	<0.001