Table 2.
Results of middle cerebral artery visualization by cross flow and the balloon test occlusion outcome
| MCA visualization | BTO-positive (%) | BTO-negative (%) | Total (%) | |
| Poor | Grade 0 | 3 (7) | 1 (2) | 4 (9) |
| Grade 1 | 1 (2) | 0 (0) | 1 (2) | |
| Grade 2 | 1 (2) | 3 (7) | 4 (9) | |
| Good | Grade 3 | 0 (0) | 12 (29) | 12 (29) |
| Grade 4 | 0 (0) | 21 (50) | 21 (50) | |
| Total | 5 (12) | 37 (88) | 42 (100) | |
Significant differences (P = 0.0002; 95%CI: 0.07-14.19) was seen between the MCA visualization and the BTO outcome. MCA: Middle cerebral artery; BTO: Balloon test occlusion.