Table 3.

Variables associated with image quality

Variables	Univariate Ordinal Regression		Multivariate Ordinal Regression
	Proportional Odds (95% CI)	p-value	Proportional Odds   (95% CI)	p-value
Age, years	1.02 (0.98–1.04)	0.30
Male	0.51 (0.18–1.30)	0.16
BMI, kg/m2*	0.91 (0.82–1.00)	0.06	1.15 (0.62–2.17)	0.34
HR, bpm*	0.51 (0.37–0.69)	<0.001	0.64 (0.43–0.94)	0.02
I-370 protocol	0.84 (0.44–1.60)	0.61
Diameter, mm	7.93 (3.72–18.3)	<0.001	5.39 (2.38–13.2)	<0.001
OWT	0.84 (0.44–1.60)	0.81
Tube current, mA†	0.82 (0.72–0.92)	0.001	0.90 (0.76–1.07)	0.25
Mean attenuation proximal to stent, HU†	1.06 (0.83–1.35)	0.63
LAI ratio	0.18 (0.08–0.38)	<0.001	0.42 (0.18–0.99)	0.04
Stent lumen SNR, HU†	1.81 (0.31–12.4)	0.51
Stent lumen CNR, HU†	1.39 (0.19–12.3)	0.74

BMI, body mass index; PHB, premature heartbeats; bpm, beats per minute.

Values are given as absolute numbers and ranges.

Only relevant variables were eligible for the multivariable regression model.

* every 5-unit increase; † every 50-unit increase.