Table 5. Calculated SNR values in the groups receiving contrast medium tailored to patient body weight.
| Paired comparison (p-value) | ||||||||||
| Vascular territory | Group 1 (1.5 ml/kg) | Group 2 (1.0 ml/kg) | Group 3 (0.5 ml/kg) | Multiple comparison (p-value) | Group 1/Group 2 | Group 1/Group 3 | Group 2/Group 3 | Group1/Control 1 | Group 2/Control 2 | Group 3/Control 3 |
| CCA | 65.9 (53.2 – 80.1) | 73.5 (58.1 – 83.8) | 57.7 (41.4 – 70.8) | .003** | .240 | .020* | .001** | .019* | .150 | .124 |
| ECA | 66.5 (51.4 – 80.2) | 72.5 (59.9 – 81.7) | 55.3 (36.6 – 68.7) | <.001** | .267 | .005** | <.001** | .006** | .176 | .067 |
| ICAex | 70.9 (53.8 – 83.0) | 74.1 (56.3 – 85.3) | 52.5 (26.9 – 61.4) | <.001** | .633 | <.001** | <.001** | <.001** | .349 | .003** |
| ICAin | 71.0 (58.5 – 84.5) | 75.6 (52.1 – 85.1) | 47.2 (27.5 – 58.4) | <.001** | .791 | <.001** | <.001** | .002** | .342 | <.001** |
| ACA | 54.6 (41.9 – 68.0) | 55.5 (39.6 – 69.1) | 30.3 (16.9 – 36.1) | <.001** | .590 | <.001** | <.001** | <.001** | .356 | <.001** |
| MCA | 61.3 (51.7 – 73.9) | 64.4 (51.3 – 81.8) | 40.1 (19.5 – 45.1) | <.001** | .573 | <.001** | <.001** | <.001** | .232 | <.001** |
| PcomA | 43.1 (28.4 – 55.4) | 46.0 (31.6 – 52.1) | 20.9 (12.9 – 27.3) | <.001** | .922 | <.001** | <.001** | .020* | .098 | .001** |
| PCA | 52.9 (42.6 – 63.4) | 54.7 (40.8 – 66.9) | 37.8 (18.9 – 42.9) | <.001** | .999 | <.001** | <.001** | <.001** | .380 | <.001** |
| SCA | 32.3 (27.5 – 40.5) | 30.3 (25.9 – 38.9) | 23.8 (13.9 – 26.0) | <.001** | .361 | <.001** | <.001** | <.001** | .211 | <.001** |
| AICA | 24.2 (18.8 – 29.2) | 25.9 (19.6 – 37.3) | 22.4 (16.4 – 29.1) | .007* | .351 | .043* | .004** | .028* | .055 | .123 |
| VA | 64.0 (48.2 – 73.6) | 69.0 (54.5 – 78.5) | 51.5 (31.4 – 59.9) | <.001** | .386 | <.001** | <.001** | .002** | .050 | .041* |
| PICA | 29.0 (25.0 – 39.7) | 32.7 (26.8 – 37.0) | 25.4 (19.4 – 34.7) | .022* | .547 | .028* | .010* | .234 | .218 | .843 |
| AcomA | 40.8 (35.2 – 55.4) | 44.4 (30.8 – 55.3) | 32.3 (22.4 – 36.6) | .006** | .747 | .002** | .012* | .124 | .761 | .128 |
| BA | 62.3 (52.2 – 76.6) | 65.3 (49.3 – 76.5) | 48.1 (23.2 – 57.7) | .001** | .914 | .002** | .001** | .011* | .518 | .062 |
SNR data are presented as medians (25th percentile–75th percentile). Overall p-value was calculated by Kruskal-Wallis test. Pairwise comparison was performed by means of Mann-Whitney U-test with interim analyses by Bonferroni-Holm adjustment. *A p-value<0.05 was considered statistically significant. ** p<0.01.