Relationship between Raymond–Roy Grade Scale and patient characteristics
| Variable | RRGS I (n=373) | RRGS II (n=125) | RRGS III (n=140) | P value |
| Raymond–Roy Grade Scale at baseline (post-embolization) | ||||
| Age, mean±SD | 54.8±12.2 | 58.9±11.4 | 57.2±12.3 | 0.002 |
| Sex, n/N (%) | ||||
| Female | 262/361 (73) | 90 (72) | 107/138 (78) | 0.492 |
| Male | 99/361 (27) | 35 (28) | 31/138 (22) | |
| Location, n/N (%) | ||||
| Anterior circulation | 289 (77) | 76/124 (61) | 107 (76) | 0.002 |
| Posterior circulation | 84 (23) | 48/124 (39) | 33 (24) | |
| Size (mm), n/N (%) | ||||
| Small ("5) | 154 (41) | 36/123 (29) | 44/137 (32) | 0.009 |
| Medium (>5–<15) | 203 (54) | 83/123 (67) | 82/137 (60) | |
| Large (≥15–<25) | 16 (4) | 4/123 (3) | 8/137 (6) | |
| Giant (≥25) | 0 (0) | 0 (0) | 3/137 (2) | |
| Ruptured status, n/N (%) | ||||
| Yes | 81/372 (22) | 24 (19) | 15 (11) | 0.013 |
| No | 291/372 (78) | 101 (81) | 125 (89) | |
| Multiple aneurysm, n/N (%) | ||||
| Yes | 7 (2) | 6 (5) | 8 (6) | 0.049 |
| No | 366 (98) | 119 (95) | 132 (94) | |
| Wide neck, n/N (%) | ||||
| Yes | 328 (88) | 108/122 (89) | 126/137 (92) | 0.438 |
| No | 45 (12) | 14/122 (11) | 11/137 (8) | |
| Lesion side, n/N (%) | ||||
| Right | 114/372 (31) | 40/120 (33) | 59/138 (43) | 0.007 |
| Left | 111/372 (30) | 38/120 (32) | 48/138 (35) | |
| Midline | 147/372 (39) | 42/120 (35) | 31/138 (22) | |
| Configuration of stent, n/N (%) | ||||
| Single | 317/372 (85) | 102/113 (90) | 124/133 (93) | 0.007 |
| Y-stenting | 47/372 (13) | 8/113 (7) | 4/133 (3) | |
| Telescope | 8/372 (2) | 3/113 (3) | 5/133 (4) | |
| Stent-coil technique, n/N (%) | ||||
| Jailing | 123 (33) | 38/114 (33) | 81/135 (60) | 0.001 |
| Coil-through | 159 (43) | 41/114 (36) | 37/135 (27) | |
| Coil-stent | 36 (10) | 16/114 (14) | 9/135 (7) | |
| Balloon-stent | 55 (15) | 19/114 (17) | 8/135 (6) | |
| Stent type, n/N (%) | ||||
| NEU | 95 (25) | 37 (30) | 37 (26) | 0.008 |
| EP | 68 (18) | 31 (25) | 44 (31) | |
| LVIS/LVIS Jr. | 210 (56) | 57 (46) | 59 (42) | |
| Procedural-related complication, n/N (%) | ||||
| Rupture | 10 (3) | 4 (3) | 1 (1) | 0.532 |
| Stent thrombosis | 12 (3) | 4 (3) | 3 (2) | |
| Stroke | 9 (2) | 1 (1) | 2 (1) | |
| Rupture, thrombosis | 0 (0) | 1 (1) | 0 (0) | |
| Post-procedural complication, n/N (%) | ||||
| Recurrence | 20 (5) | 7 (6) | 7 (5) | 0.575 |
| Stroke | 12 (3) | 7 (6) | 6 (4) | |
| Stent stenosis | 5 (1) | 1 (1) | 2 (1) | |
| Recurrence, stroke | 0 (0) | 1 (1) | 1 (1) | |
| Recurrence, stenosis | 4 (1) | 0 (0) | 0 (0) | |
| Variable | RRGS I (n=451) | RRGS II (n=54) | RRGS III (n=67) | P value |
| Raymond–Roy Grade Scale at follow-up | ||||
| Age, mean±SD | 55.3±12.1 | 55.5±12.9 | 58.1±12.8 | 0.211 |
| Sex, n/N (%) | ||||
| Female | 329/441 (75) | 35/53 (66) | 49/66 (74) | 0.405 |
| Male | 112/441 (25) | 18/53 (34) | 17/66 (26) | |
| Location, n/N (%) | ||||
| Anterior circulation | 353 (78) | 38 (70) | 49 (73) | 0.285 |
| Posterior circulation | 98 (22) | 16 (30) | 18 (27) | |
| Size (mm), n/N (%) | ||||
| Small (″5) | 189/448 (42) | 13/53 (24) | 12/66 (18) | <0.001 |
| Medium (>5–<15) | 246/448 (55) | 37/53 (70) | 42/66 (64) | |
| Large (≥15–<25) | 13/448 (3) | 2/53 (4) | 10/66 (15) | |
| Giant (≥25) | 0 (0) | 1/53 (2) | 2/66 (3) | |
| Ruptured status, n/N (%) | ||||
| Yes | 84/450 (19) | 10 (19) | 15 (22) | 0.751 |
| No | 366/450 (81) | 44 (81) | 52 (78) | |
| Multiple aneurysms, n/N (%) | ||||
| Yes | 9 (2) | 3 (6) | 7 (10) | 0.002 |
| No | 442 (98) | 51 (94) | 60 (90) | |
| Wide neck, n/N (%) | ||||
| Yes | 395/448 (88) | 53 (98) | 62/66 (94) | 0.029 |
| No | 53/448 (12) | 1 (2) | 4/66 (6) | |
| Lesion side, n/N (%) | ||||
| Right | 146/450 (32) | 19/52 (36) | 30 (45) | 0.107 |
| Left | 146/450 (32) | 19/52 (36) | 30 (45) | |
| Midline | 169/450 (38) | 14/52 (27) | 16 (24) | |
| Configuration of stent, n/N (%) | ||||
| Single | 388/444 (87) | 48/52 (92) | 58/66 (88) | 0.007 |
| Y-stenting | 50/444 (11) | 2/52 (4) | 3/66 (4) | |
| Telescope | 6/444 (2) | 2/52 (4) | 5/66 (8) | |
| Stent-coil technique, n/N (%) | ||||
| Jailing | 163/445 (37) | 24/52 (46) | 33/66 (50) | 0.417 |
| Coil-through | 173/445 (39) | 17/52 (33) | 20/66 (30) | |
| Coil-stent | 45/445 (10) | 3/52 (6) | 6/66 (9) | |
| Balloon-stent | 64/445 (14) | 8/52 (15) | 7/66 (11) | |
| Stent type, n/N (%) | ||||
| NEU | 117 (26) | 15 (28) | 18 (27) | 0.004 |
| EP | 83 (18) | 15 (28) | 25 (37) | |
| LVIS/LVIS Jr. | 251 (56) | 24 (44) | 24 (36) | |
| Procedural-related complication, n/N (%) | ||||
| Rupture | 10 (2) | 1 (2) | 0 (0) | 0.368 |
| Stent thrombosis | 15 (3) | 0 (0) | 3 (4) | |
| Stroke | 8 (2) | 2 (4) | 2 (3) | |
| Rupture, thrombosis | 1 (0.2) | 0 (0) | 0 (0) | |
| Post-procedural complication, n/N (%) | ||||
| Recurrence | 1 (0.2) | 10 (19) | 23 (34) | <0.001 |
| Stroke | 14 (3) | 0 (0) | 4 (6) | |
| Stent stenosis | 6 (1) | 0 (0) | 2 (3) | |
| Recurrence, stroke | 2 (0.4) | 0 (0) | 0 (0) | |
| Recurrence, stenosis | 0 (0) | 1 (2) | 3 (4) | |