Table 3.

Results of the PTFM.

Features	β	S．E	Wald z value	Multivariate OR (95% CI)	P value
Constant	-3.80	0.59	-6.50	0.02(0.01- 0.07)	<0.001
Quantity	0.44	0.29	1.53	1.55(0.89- 2.76)	0.127
Single
Multiple
Shape	0.68	0.33	2.05	1.98(1.04- 3.87)	0.040
Oval, round
Irregular
Orientation	1.56	0.22	6.97	4.78(3.10- 7.48)	<0.001
Parallel Not parallel
Main posterior echo	0.30	0.20	1.49	1.35(0.91-2.01)	0.136
Enhancement Indifferent Shadowing
Microcalcification	0.32	0.21	1.55	1.38(0.92- 2.07)	0.122
Preserved Absent
CDFI	0.58	0.22	2.62	1.79(1.16- 2.77)	0.009
Adler 0,1 Adler 2,3
US tumour size	0.05	0.01	5.07	1.05(1.03- 1.07)	<0.001
HER-2	0.63	0.24	2.67	1.87(1.18- 2.98)	0.008
Negative Positive