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Table 2 Mean contrast agent dose administered in 201 patients of the study population

From: Abdominal CT: a radiologist-driven adjustment of the dose of iodinated contrast agent approaches a calculation per lean body weight

Item Valuea CoV
Amount of injected CA (g) 32 ± 5 16%
Dose of CA per TBW (gI/kg) 0.46 ± 0.06 13%
Dose of CA per TBW (gI/kg) according to BMIb
 Underweight (BMI < 18.5 kg/m2) 0.56 ± 0.08 14%
 Normal weight (18.5 ≤ BMI < 25 kg/m2) 0.48 ± 0.05 10%
 Overweight (25 ≤ BMI < 30 kg/m2) 0.44 ± 0.04 9%
 Obese (BMI ≥ 30 kg/m2) 0.41 ± 0.04 10%
Dose of CA per LBW (gI/kg) 0.63 ± 0.09 14%
Dose of CA per LBW (gI/kg) according to BMIc
 Underweight (BMI < 18.5 kg/m2) 0.68 ± 0.11 16%
 Normal weight (18.5 ≤ BMI < 25 kg/m2) 0.62 ± 0.08 13%
 Overweight (25 ≤ BMI < 30 kg/m2) 0.62 ± 0.08 13%
 Obese (BMI ≥ 30 kg/m2) 0.65 ± 0.11 17%
Liver contrast enhancement (HU)d 43 ± 9 21%
Liver contrast enhancement (HU) according to BMIe
 Underweight (BMI < 18.5 kg/m2) 51 ± 18 35%
 Normal weight (18.5 ≤ BMI < 25 kg/m2) 44 ± 8 18%
 Overweight (25 ≤ BMI < 30 kg/m2) 42 ± 9 18%
 Obese (BMI ≥ 30 kg/m2) 40 ± 6 15%
  1. aData represent mean ± standard deviation
  2. bThis trend showed a significant negative association (p < 0.001)
  3. cThe comparison was not statistically significant (p ≥ 0.065)
  4. dCalculated as the difference between the computed tomography (CT) value measured in the venous phase and that measured before contrast agent injection
  5. eThis trend showed a significant negative association (p = 0.004)
  6. BMI body mass index, CA contrast agent, CoV coefficient of variation, gI grams of iodine, HU Hounsfield units, LBW lean bodyweight, TBW total bodyweight