. Author manuscript; available in PMC: 2010 Apr 3.

Published in final edited form as: AJR Am J Roentgenol. 2007 Dec;189(6):1474–1483. doi: 10.2214/AJR.07.2122

TABLE 3.

Results of Multivariate U - Statistical Analysis and Odds Ratio

Combination	Arterial Phase	Portal Venous Phase	Diameter (cm)	Malignant/Benign (n)	Odds Ratio	95% CI
1	Hypervascular	Hypovascular		63/9	27.78	12.53–61.59^a
			> 2	49/2	71.93	16.83–307.33^a
			≤ 2	14/7	3.24	1.25–8.37^a
2	Hypervascular	Isovascular or hypervascular		18/48	0.44	0.23–0.82
			> 2	16/8	3.3	1.35–8.05^a
			≤ 2	2/40	0.05	0.01–0.22
3	Isovascular	Hypovascular	—	4/3	1.98	0.43–9.07
			> 2	4/1	6.04	0.6–54.93^a
			≤ 2	0/2	0
4	Hypovascular	Hypovascular	—	7/7	1.49	0.50–4.40
			> 2	3/3	1.47	0.29–7.45
			≤ 2	4/3	0.97	0.26–3.53
5	Hypovascular	Isovascular	—	4/17	0.31	0.48–4.59
			> 2	1/1	1.46	0.09–23.68
			≤ 2	3/16	0.25	0.07–0.88
6	Isovascular	Isovascular	—	0/53	0
7	Peripheral nodular vascularity and fill-in			0/3	0

Note—Multivariate U statistical analysis was performed on data obtained from consensus analysis of nodule vascularity. The odds ratio expresses the relation with diagnosis of malignancy and is calculated without (—) or with inclusion of the nodule dimension cutoff of 2 cm.

Variable combination selected as criterion for malignancy for independent analysis: significant improvement of malignant classification at multivariate U statistical analysis.