Table 2.

The Univariate Association of Adverse Attenuation with Other Parameters

Variables	P	R
Age/years	0.54	−0.07
Body mass index (kg/m2)	0.49	0.10
Anteroposterior breast tissue thickness/cm	0.15	0.18
Anteroposterior internal density (Hounsfield units)	0.97	0.005
Anteroposterior external density (Hounsfield units)	0.93	−0.11
Anteroposterior middle density (Hounsfield units)	0.87	0.02
Lateral breast tissue thickness/cm	0.002	0.37
Lateral internal density (Hounsfield units)	0.009	−0.32
Lateral external density (Hounsfield units)	0.76	−0.03
Lateral middle density (Hounsfield units)	0.09	−0.21
Left anterior oblique breast tissue thickness/cm	0.008	0.33
Left anterior oblique internal density (Hounsfield units)	0.14	−0.19
Left anterior oblique external density (Hounsfield units)	0.52	0.08
Left anterior oblique middle density (Hounsfield units)	0.11	−0.20