Table 1.
Demographic and clinical characteristics of patients with IAs at baseline.
| Indicators | RIAs (n = 105) | UIAs (n = 185) | p value |
|---|---|---|---|
| Age, year | 56.30 ± 12.38 | 57.69 ± 11.21 | 0.332 |
| Female, n (%) | 65 (61.90) | 130 (70.27) | 0.145 |
| Hypertension, n (%) | 59 (56.19) | 93 (50.27) | 0.332 |
| Smoking, n (%) | 21 (20.00) | 24 (12.97) | 0.112 |
| Diabetes mellitus, n (%) | 8 (7.62) | 30 (16.22) | 0.037 |
| Hyperlipidemia, n (%) | 2 (1.90) | 2 (1.08) | 0.957 |
| Alcohol use, n (%) | 15 (14.29) | 23 (12.43) | 0.653 |
| Aspirin use, n (%) | 2 (1.90) | 25 (13.51) | 0.001 |
| Heart disease, n (%) | 10 (9.52) | 18 (9.73) | 0.954 |
| Stroke, n (%) | 18 (17.14) | 25 (13.51) | 0.403 |
| Aneurysm location, n (%)* | < 0.001 | ||
| MCA | 17 (16.19) | 37 (20.00) | |
| ICA | 40 (38.10) | 113 (61.08) | |
| ACA | 29 (27.62) | 17 (9.19) | |
| Posterior circulation | 19 (18.10) | 18 (9.73) | |
| Aneurysm size, mm | 6.12 ± 3.57 | 5.97 ± 4.00 | 0.736 |
| Vitamin D, ng/mL | 16.86 ± 9.167 | 19.28 ± 7.91 | 0.019 |
| Ca, mmol/L | 2.28 ± 0.10 | 2.28 ± 0.10 | 0.851 |
| P, mmol/L | 1.02 ± 0.25 | 2.01 ± 10.50 | 0.336 |
| Season**, n (%) | 0.229 | ||
| Summer/autumn | 42 (40.00) | 61 (32.97) | |
| Winter/spring | 63 (60.00) | 124 (67.03) |
Bold: p < 0.05.
*MCA middle cerebral artery, ICA internal carotid artery, ACA anterior cerebral artery.
**The season of blood collection was defined as “summer/autumn” (December to May), “winter/spring” (June to November).