Table 3.

Multiple linear regression analysis with the difference between AAA measurements as the outcome of interest

Linear regression	Difference in aortic annular area
	β	p-value
BMI (kg/m2)	−0.32	0.1
CTDIvol (mGy)	0.25	0.2
HF mean (bpm)	−0.08	0.5
HF-Variability	−0.005	0.97
Average HU attenuation	0.26	0.09
CNR	−0.07	0.6
Subjective Image Quality of HPS-CTA	0.5	< 0.001

The regression model was significant (r² = 0.23, p = 0.03)

BMI body-mass-index; CTDIvol, Dose CT Volume Index; HF heart frequency, HU Hounsfield Units; CNR contrast-to-noise ratio