Table 1. Comparison of baseline characteristics of patients receiving low-dose aspirin and patients receiving high- dose aspirin*.
| Characteristic | Patients receiving low-dose aspirin (N = 273) | Patients receiving high-dose aspirin (N = 97) | P value |
| Age — yr | 59.2±8.1 | 58.2±9.3 | 0.39 |
| Male sex — no. (%) | 228(83.5) | 75 (77.3) | 0.22 |
| Risk factors— no. (%) | |||
| Hypertension | 222 (81.3) | 73 (75.3) | 0.24 |
| Hyperlipidemia | 158 (57.9) | 57 (58.8) | 0.91 |
| Diabetes mellitus | 92 (33.7) | 33 (34.0) | 1.00 |
| Smoking | 164 (60.1) | 47 (48.5) | 0.07 |
| Obesity | 24 (8.8) | 9 (9.3) | 0.84 |
| Qualifying ischaemic events — no. (%) | |||
| TIA | 149 (54.6) | 64 (66.0) | 0.06 |
| Stroke | 124 (45.4) | 33 (34.0) | 0.06 |
| Symptomatic qualifying artery — no. (%) | |||
| BA | 109 (40.0) | 38 (39.2) | 1.00 |
| Intracranial vertebral | 101 (37.0) | 35 (36.1) | 0.90 |
| MCA | 34 (12.5) | 15 (15.5) | 0.49 |
| Intracranial carotid | 29 (10.6) | 9 (9.3) | 0.85 |
| Cases with loading dose of clopidogrel | 12 (4.4) | 4 (4.1) | 1.00 |
| Time from qualifying event to endovascular treatment— days | 0.52 | ||
| Median | 25 | 22 | |
| Interquartile range | 10–41 | 12–30 |
*Plus–minus values are means ±SD. Baseline characteristics of the two groups were compared with the use of either an independent groups t-test (for means) or a chi-square test (for percentages). TIA denotes transient ischaemic attack; BA denotes basilar artery; MCA denotes middle cerebral artery.