Table 4.
Primary and secondary outcomes for all groups on a per-patient and per-segment level.
| Parameter | Group BW | Group LBW | Group CO | p value BW vs. LBW | p value BW vs. CO | p value LBW vs. CO |
|---|---|---|---|---|---|---|
| No. of patients | n = 112 | n = 108 | n = 107 | |||
| Image quality parameters per patient | ||||||
| Attenuation (HU) | 423 ± 60 | 404 ± 61 | 413 ± 63 | 0.024∗ | 0.211 | 0.333 |
| Scans 325–500HU (%) | 83.9 | 84.3 | 86.9 | 0.947 | 0.532 | 0.579 |
| Scans ≥325HU (%) | 95.5 | 89.8 | 95.3 | 0.102 | 0.941 | 0.124 |
| Noise | 39 ± 8 | 39 ± 8 | 40 ± 9 | 0.844 | 0.332 | 0.451 |
| CNR | 14 ± 3 | 14 ± 3 | 14 ± 3 | 0.313 | 0.094 | 0.530 |
| SNR | 12 ± 3 | 11 ± 3 | 12 ± 5 | 0.117 | 0.970 | 0.265 |
| Good-excellent image quality (%) | 94.6 | 86.1 | 90.7 | 0.031∗ | 0.257 | 0.299 |
|
| ||||||
| No. of segments | n = 1.599 | n = 1.556 | n = 1.523 | |||
| Image quality parameters per segment | ||||||
| Scans 325–500HU (%) | 67.4 | 67.4 | 66.5 | 1.000 | 0.618 | 0.621 |
| Scans ≥325HU (%) | 90.7 | 87.2 | 88.6 | 0.002∗ | 0.061† | 0.224 |
| Good-excellent image quality (%) | 82.9 | 75.1 | 78.6 | <0.001∗ | 0.003† | 0.023• |
Note. Values are presented as mean ± standard deviation. BW = body weight; LBW = lean body weight; CO = cardiac output; HU= Hounsfield units; CNR = contrast-to-noise ratio; SNR = signal-to-noise ratio. ∗A significant difference was found between group BW and group LBW. †A significant difference was found between group BW and group CO. •A significant difference was found between group LBW and group CO.