Table 2.

Results of univariate and multivariate logistic regression analysis between ultrasound features and malignant breast nonmass lesions

Variables	Univariate logistic regression analysis					Multivariate logistic regression analysis
	β	S.E	Z	P	OR (95%CI)	β	S.E	Z	P	OR (95%CI)
Distribution
focal					1.00 (Reference)					1.00 (Reference)
linear	0.61	0.53	1.15	0.250	1.84 (0.65–5.21)	1.55	0.67	2.31	0.021	4.69 (1.26–17.42)
regional	1.42	0.34	4.23	< 0.001	4.14 (2.14–8.00)	0.75	0.45	1.69	0.090	2.13 (0.89–5.09)
segmental	3.04	0.74	4.09	< 0.001	20.93 (4.88–89.81)	2.04	0.87	2.33	0.020	7.67 (1.39–42.46)
Echo Pattern
hyperechoic					1.00 (Reference)
Hypoechoic	-0.09	0.82	-0.11	0.915	0.92 (0.18–4.60)
mixed	-0.64	0.91	-0.71	0.478	0.53 (0.09–3.10)
Small Cysts
no					1.00 (Reference)
yes	-0.59	0.51	-1.16	0.245	0.55 (0.20–1.50)
Posterior Shadowing
no					1.00 (Reference)					1.00 (Reference)
yes	0.98	0.28	3.44	< 0.001	2.65 (1.52–4.62)	1.14	0.41	2.78	0.006	3.14 (1.40–7.03)
Calcifcation
no					1.00 (Reference)					1.00 (Reference)
yes	2.42	0.24	10.02	< 0.001	11.30 (7.03–18.16)	2	0.31	6.42	< 0.001	7.40 (4.02–13.64)
Architectural Distortion
no					1.00 (Reference)
yes	0.57	0.21	2.7	0.007	1.76 (1.17–2.66)
Duct Change
no					1.00 (Reference)
yes	0.74	0.3	2.49	0.013	2.09 (1.17–3.74)
Vascularity
hypervascularity					1.00 (Reference)					1.00 (Reference)
hypovascularity	-2.17	0.24	-8.95	< 0.001	0.11 (0.07–0.18)	-0.96	0.32	-3.02	0.003	0.38 (0.21–0.71)
Elasticity Score
≤ 3					1.00 (Reference)					1.00 (Reference)
4	2.41	0.26	9.14	< 0.001	11.11 (6.63–18.62)	1.95	0.33	5.93	< 0.001	7.00 (3.68–13.31)
5	3.26	0.44	7.45	< 0.001	25.94 (11.01–61.11)	2.76	0.51	5.45	< 0.001	15.77 (5.85–42.52)

OR: Odds Ratio, CI: Confidence Interval