Table 1
| BMI (kg/m2) | mean BMI (kg/m2) | mean CTDIvol (mGy) | stdev CTDIvol (mGy) | min CTDIvol (mGy) | max CTDIvol (mGy) | Mean percent difference | |
| group 1 (N=116) | ≥ 30 | 37.72 | 2.78 | 1.46 | 0.87 | 7.19 | 8.59 |
| group 2 (N=101) | < 30 | 26.41 | 1.18 | 0.30 | 0.86 | 2.40 | 6.26 |
| Both groups | all | 32.43 | 2.03 | 1.35 | 0.86 | 7.19 | 7.50 |