Summary of baseline clinical characteristics and stent information in the four patient groups
| Variable | Total (n=420) | PAT (n=267) | ICA-OCC (n=43) | CVA-OCC (n=93) | C-OCC (n=17) | F/χ2 value | P value |
| Clinical characteristics | |||||||
| Age (years) | 65.5±9.0 | 66.2±8.4 | 65.0±7.8 | 64.5±10.7 | 62.4±9.7 | 1.66 | 0.18 |
| Gender (men/women) | 353/67 | 218/49 | 35/8 | 86/7 | 14/3 | 6.33 | 0.10 |
| Diabetes (n (%)) | 132 (31.4) | 85 (31.8) | 20 (46.5) | 20 (21.5) | 7 (41.2) | 10.54 | 0.10 |
| Hypertension (n (%)) | 261 (62.1) | 163 (61.0) | 25 (58.1) | 60 (64.5) | 13 (76.5) | 2.67 | 0.85 |
| Hyperlipidemia (n (%)) | 172 (41.0) | 95 (35.6) | 21 (48.8) | 46 (49.5) | 10 (58.8) | 9.34 | 0.16 |
| Smokers (n (%)) | 255 (60.7) | 153 (57.3) | 31 (72.1) | 58 (62.4) | 13 (76.5) | 5.98 | 0.43 |
| Posterior TIA (n (%)) | 399 (95.0) | 259 (97.0) | 40 (93.0) | 85 (91.4) | 15 (88.2) | 6.79 | 0.08 |
| Posterior CF (n (%)) | 112 (26.7) | 68 (25.5) | 17 (39.5) | 22 (23.7) | 5 (29.4) | 4.33 | 0.23 |
| Stent information | |||||||
| Type I (DES/BMS) (n (%)) | 216/204 | 149/118 | 16/27 | 44/49 | 7/10 | 6.87 | 0.08 |
| Type II (SES/BES) (n (%)) | 20/400 | 10/257 | 5/38 | 4/89 | 1/16 | 5.17 | 0.16 |
| Length (mm) | 15.5±5.4 | 15.2±5.1 | 17.5±7.3 | 15.2±5.0 | 15.7±6.4 | 2.37 | 0.07 |
| Diameter (mm) | 4.5±1.1 | 4.4±1.1 | 4.9±1.4 | 4.6±1.2 | 4.8±1.0 | 2.39 | 0.07 |
| Side (left/right) (n (%)) | 221/199 | 147/120 | 20/23 | 45/48 | 9/8 | 1.95 | 0.58 |
BES, balloon expanded stent; BMS, bare metal stent; C-OCC, combined occlusions; CF, cerebral infarction; CVA-OCC, contralateral VA occlusion; DES, drug eluting stent; ICA-OCC, internal carotid artery occlusion; TIA, transient ischemic attack; PAT, patent in bilateral ICA and contralateral VA; SES, self-expanded stent; VA, vertebral artery.