Table 3 Multivariate linear regression of the factors associated with iodine concentration.

From: Quantifying iodine concentration in the normal bowel wall using dual-energy CT: influence of patient and contrast characteristics

Variables

Model 1

Model 2

Model 3

Variables associated with BWIC

Variables associated with BWICorgan

Varaibles associated with BWICaorta

Odds Ratio

95% Confidence interval

P value

Odds Ratio

95% Confidence interval

P value

Odds Ratio

95% Confidence interval

P value

Age

1

1.00–1.00

0.052

1

0.99–1.00

0.747

1

0.99–1.00

0.063

Male sex

1.04

0.95–1.12

0.395

0.99

0.96–1.02

0.562

0.99

0.98–0.99

0.043

Body mass index

1.01

1.00–1.02

0.008

1

0.99–1.00

0.371

1.01

0.99–1.00

0.141

Contrast agent

iomeprol 350

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

iomeprol 400

1.07

0.99–1.16

0.091

1

0.96–1.03

0.950

1

0.97–1.03

0.306

Iodine concentration

400 mg iodine/kg

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

500 mg iodine/kg

1.51

1.36–1.66

 < 0.001

1

0.96–1.03

0.946

1

0.97–1.03

0.166

600 mg iodine/kg

2.06

1.88–2.27

 < 0.001

1.03

0.99–1.06

0.130

1.02

0.99–1.05

0.054

Bowel segment

Stomach

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Duodenum

1.06

0.99–1.13

0.053

1.03

1.01–1.05

0.005

1.01

1.00–1.03

0.023

Jejunum

0.96

0.90–1.02

0.231

0.98

0.96–1.00

0.147

0.99

0.98–1.00

0.108

Ileum

0.64

0.61–0.68

 < 0.001

0.84

0.82–0.85

 < 0.001

0.91

0.90–0.92

 < 0.001

Right colon

0.45

0.42–0.47

 < 0.001

0.72

0.71–0.73

 < 0.001

0.84

0.83–0.86

 < 0.001

Left colon

0.39

0.37–0.41

 < 0.001

0.69

0.68–0.70

 < 0.001

0.82

0.81–0.82

 < 0.001

Rectum

0.31

0.29–0.32

 < 0.001

0.62

0.61–0.64

 < 0.001

0.78

0.77–0.80

 < 0.001

  1. BWIC = Bowel wall iodine concentration; BWICorgan: Bowel wall iodine concentration normalized on background upper abdominal organs; BWICaorta: Bowel wall iodine concentration normalized on aorta.
  2. Significant values are in bold.