CVIR Endovascular

Table 5 Univariate and multivariate linear regression modelling of factors influencing radiation dose (n = 154)

From: Patient radiation dose during angiography and embolization for abdominal hemorrhage: the influence of CT angiography, fluoroscopy system, patient and procedural variables

	Univariate				Multivariate
	R2	B	95% CI	p	R2	B	95% CI	p
Air-Kerma Product (PKA)					0. 459			< 0.005
Age	0.005	77.52	(−96)-251	0.379
Duration	0.058	124	44–204	0.003		112	(−5.6)-231	0.062
FT	0.046	5.2	1.42–8.99	0.007		0.229	(−5.07)-5.53	0.932
DSA runs	0.158	1638	1028–2248	< 0.005		929	309–1548	0.004
Location	0.011	− 2307	(− 6306)-2050	0.197
Indication	0.004	− 1752	(− 5766)-1692	0.449
BMI	0.117	5701	3394–7970	0.001		5714	3632–7795	< 0.005
FS	0.199	−16,665	(−22,438)- (−10,800)	0.001		16,561	21,258–11,863	< 0.005
Reference Air Kerma (K_a,r)					0.152			< 0.005
Age	0.005	6.8	(−10)-24	0.426
Duration	0.013	5.7	(−2.63)-14.02	0.179
FT	0.012	0.255	(−0.142)-0.653	0.206
DSA runs	0.066	97.68	35.18–160.19	0.002		87	26.65–147.33	0.005
Location	0.006	− 171	(− 533)-189	0.329
Indication	0.002	−117	(− 552)-317	0.595
BMI	0.034	280	26–535	0.031		240	(−3.31)-483	0.053
FS	0.071	909	350–1467	0.002		822	1364–280	0.003

Table 5 displays the results of both the univariate and multivariate regression analysis of the patient and procedural factors influence on patient radiation dose, measured as both PKA (air kerma-area product) and K_a,r (reference air kerma). Only those factors that were found to have a significant impact on radiation dose during the univariate analysis were included in the multivariate analysis
FT Fluoroscopy Time, FS Fluoroscopy System

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