| Number of cases | Premedication without change of contrast media group | Premedication with change of contrast media group | No premedication and no change of contrast media group | No premedication with change of contrast media group | |
| 39 | 340 | 56 | 9 | ||
| Age | Mean (years) | 67.5 | 67.1 | 61.3 | 64.6 |
| Sex | Male | 31 | 178 | 39 | 5 |
| Female | 8 | 162 | 17 | 4 | |
| Severity of previous adverse reactions | Grade 1 | 39 | 337 | 56 | 9 |
| Grade 2 | 0 | 3 | 0 | 0 | |
| Grade 3 | 0 | 0 | 0 | 0 | |
| Type of contrast media that led to previous adverse reactions | Iopamidol | 22 | 196 | 3 | 5 |
| Iomeprol | 5 | 38 | 0 | 0 | |
| Iohexol | 12 | 101 | 41 | 3 | |
| Iopamidol/Iomeprol | 0 | 0 | 0 | 0 | |
| Iopamidol/Iohexol | 0 | 5 | 10 | 1 | |
| Iohexol/Iomeprol | 0 | 0 | 1 | 0 | |
| Iopamidol/Iohexol/Ioversol | 0 | 0 | 1 | 0 |