Fisher’s exact test for flow diverting stents
| Product | Coating | Centers, n | Procedures, n (%) | Cases with NICE lesions, n (%) | Product family, N (%) | Cases with NICE lesions, n (%) | P values* |
| DERIVO/DERIVO 2 | None | 2 | 151 (12.6) | 4 (33.3) | 153 (12.7) | 5 (41.7) | 0.01† |
| DERVO 2heal | Fibrin-based nanocoating | 1 | 2 (0.2) | 1 (8.3) | |||
| FRED | None | 3 | 152 (12.7) | 0 (0.0) | 244 (20.3) | 0 (0.0) | 0.14 |
| FRED Jr. | None | 2 | 18 (1.5) | 0 (0.0) | |||
| FRED X | Nanoscale surface | 2 | 74 (6.2) | 0 (0.0) | |||
| PED | None | 3 | 17 (1.4) | 1 (8.3) | 161 (13.4) | 6 (50.0) | 0.00‡ |
| PED Shield | Phosphorylchlorine | 2 | 120 (10.0) | 3 (25.0) | |||
| PED Ventage | Phosphorylchlorine | 2 | 24 (2.0) | 2 (16.7) | |||
| p48 MW | None | 2 | 16 (1.3) | 0 (0.0) | 499 (41.5) | 0 (0.0) | 0.00‡ |
| p48 HPC | Hydrophilic polymer | 4 | 212 (17.7) | 0 (0.0) | |||
| p64/p64 MW | None | 4 | 93 (7.7) | 0 (0.0) | |||
| p64 HPC | Hydrophilic polymer | 3 | 178 (14.8) | 0 (0.0) | |||
| SILK | None | 1 | 16 (1.3) | 0 (0.0) | 107 (8.9) | 0 (0.0) | 0.62 |
| SILK Vista Baby | None | 2 | 91 (7.6) | 0 (0.0) | |||
| SURPASS Streamline | None | 2 | 37 (3.1) | 1 (8.3) | 37 (3.1) | 1 (8.3) | 0.32 |
| Overall | 5 | 1201 (100.0) | 12 (100.0) |
*p values were calculated with the Fisher’s exact test using four-field tables, comparing the incidence of NICE lesions associated with the respective device with the entire sample.
†Significant p<0.05.
‡Highly significant p<0.01.
NICE, non-ischemic cerebral enhancing.