Table 6.

Multivariate logistic analysis results and risk factor scores.

Index	Reality	Low echo	Very low echo	Aspect ratio ≥1	Unclear boundary	Irregular shape	Microcalcification
β-Value	0.968	1.268	1.941	1.493	1.044	2.357	2.683
Wald x2	8.627	42.504	14.325	22.952	8.459	44.106	12.640
P value	0.003	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
OR value	2.645	3.533	6.958	4.146	2.846	10.515	14.598
Scoring system	10.0	13.0	20.0	15.8	10.8	24.4	27.81
Lower limit	1.382	2.416	2.548	2.425	1.415	8.262	9.182
Upper limit	5.037	5.148	19.008	8.188	5.718	9.185	23.198