Table 1 Characteristics of patients with and without long-term aspirin use before and after matching
Characteristics | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
Aspirin group (n = 21) | Non-aspirin group (n = 194) | P value | Aspirin group (n = 21) | Non-aspirin group (n = 42) | P value | |
Age (year) | 58.9 ± 8.4 | 53.9 ± 10.4 | 0.037 | 58.9 ± 8.4 | 57.2 ± 10.3 | 0.737 |
Sex | 0.666 | 0.422 | ||||
Male | 7 (33.3) | 74 (38.1) | 7 (33.3) | 10 (23.8) | ||
Female | 14 (66.7) | 120 (61.9) | 14 (66.7) | 32 (76.2) | ||
Hunt-Hess grade | > 0.999 | > 0.999 | ||||
1–3 | 20 (95.2) | 186 (95.9) | 20 (95.2) | 40 (95.2) | ||
4–5 | 1 (4.8) | 8 (4.1) | 1 (4.8) | 2 (4.8) | ||
Modified Fisher grade | 0.331 | 0.285 | ||||
1 | 3 (14.3) | 13 (6.7) | 3 (14.3) | 2 (4.8) | ||
2–3 | 5 (23.8) | 68 (35.1) | 5 (23.8) | 16 (38.1) | ||
4 | 13 (61.9) | 113 (58.2) | 13 (61.9) | 24 (57.1) | ||
Aneurysm size (mm) | 6.3 ± 2.6 | 6.2 ± 3.3 | 0.421 | 6.3 ± 2.6 | 6.5 ± 3.2 | 0.901 |
Site | > 0.999 | > 0.999 | ||||
Anterior circulation | 21 (100) | 191 (98.5) | 21 (100) | 42 (100) | ||
Posterior circulation | 0 | 3 (1.5) | 0 | 0 | ||
Comorbidity history | 20 (95.2) | 113 (58.2) | 0.001 | 20 (95.2) | 42 (100) | 0.333 |
Mean propensity score | 0.173 | 0.090 | 0.165 | 0.163 |