Table 2.
PHASES (Population, Hypertension, Age, Size, earlier SAH and site of aneurysm) and additional patient characteristics
| Characteristic | Asymptomatic, N = 3141 | Symptomatic, N = 731 | p-value2 |
|---|---|---|---|
| Population | |||
| North American | 108 (34) | 30 (41) | 0.268 |
| Chinese | 206 (66) | 43 (59) | 0.268 |
| Hypertension | 174 (55) | 39 (53) | 0.826 |
| Age | 64 (53, 71) | 59 (52, 66) | 0.022 |
| Age > 70 years | 85 (27) | 11 (15) | 0.037 |
| Size | 5.50 (4.20, 8.20) | 8.40 (6.20, 15.90) | < 0.001 |
| < 7 mm | 199 (63) | 29 (40) | |
| 7–9.9 mm | 67 (21) | 16 (22) | |
| 10–19.9 mm | 41 (13) | 17 (23) | |
| ≥ 20 mm | 6 (2) | 10 (14) | |
| Earlier SAH | 0 | 0 | NA |
| Aneurysm location | |||
| ICA | 134 (43) | 31 (42) | 0.953 |
| MCA | 61 (19) | 13 (18) | 0.790 |
| ACOM, PCOM or posterior circulation3 | 119 (38) | 28 (38) | 0.876 |
| Total PHASES score | 4 (2, 6) | 6 (4, 8) | < 0.001 |
| Female sex | 230 (73) | 55 (75) | 0.585 |
| Current smoking | 48 (15) | 18 (25) | 0.048 |
| Irregular shape | 65 (21) | 20 (27) | 0.191 |
| 3D-CAWE | 0.69 (0.57, 0.86) | 0.86 (0.67, 1.00) | < 0.001 |
1n (%); Median (Q1, Q3)
2Pearson’s Chi-squared test; Wilcoxon rank sum test
3High risk locations: ACOM, PCOM and posterior circulation.
Abbreviations: ACOM: anterior communicating artery, PCOM: Posterior communicating artery, 3D-CAWE: three-dimensional circumferential aneurysm wall enhancement.