TABLE 1.
Baseline Characteristics of Subjects in the HEAT Study
| Hydrogel coil | Bare platinum | |
|---|---|---|
| 297 | 303 | |
| Sex | ||
| Female | 238 (80.1) | 236 (77.9) |
| Male | 59 (19.9) | 67 (22.1) |
| Age | ||
| (Mean ± SD) | 56.5 ± 11.5 | 56.9 ± 10.3 |
| Ruptured status | ||
| Unruptured | 216 (74.0) | 208 (69.1) |
| Ruptured | 76 (26.0) | 93 (30.9) |
| If ruptured, Hunt and Hess | ||
| 1 | 14 (18.4) | 21 (22.3) |
| 2 | 39 (51.3) | 47 (50.0) |
| 3 | 22 (28.9) | 26 (27.7) |
| 4 | 1 (1.3) | 0 (0.0) |
| Neck size | ||
| (mm) | 3.20 ± 1.40 | 3.00 ± 1.10 |
| Dome-to-neck ratio | ||
| ≤1.5 | 33 (11.6) | 21 (7.4) |
| >1.5 | 251 (88.4) | 263 (92.6) |
| Maximum diameter (mm) | 7.30 ± 2.70 | 7.50 ± 2.70 |
| Shape | ||
| Daughter sac | 54 (18.9) | 60 (20.5) |
| Irregular | 59 (20.6) | 69 (23.6) |
| Regular | 173 (60.5) | 163 (55.8) |
| Type | ||
| Bifurcation | 156 (54.5) | 141 (48.3) |
| Sidewall | 86 (30.1) | 107 (36.6) |
| Terminal | 44 (15.4) | 44 (15.1) |
| Location | ||
| Anterior cerebral artery | 10 (3.5) | 7 (2.4) |
| Anterior communicating artery | 70 (24.5) | 64 (22.0) |
| Basilar artery | 35 (12.2) | 34 (11.7) |
| Internal carotid artery | 76 (26.6) | 99 (34.0) |
| Middle cerebral artery | 39 (13.6) | 29 (10.0) |
| Posterior communicating artery | 51 (17.8) | 53 (18.2) |
| Vertebral artery | 5 (1.7) | 5 (1.7) |
| Family history of aneurysm | ||
| No | 224 (76.7) | 227 (75.2) |
| Yes | 68 (23.3) | 75 (24.8) |
| Co-morbid conditions | ||
| No | 73 (24.6) | 87 (28.7) |
| Yes | 224 (75.4) | 216 (71.3) |
| Smoking status | ||
| Current smoker | 116 (39.7) | 114 (37.7) |
| Never smoked | 71 (24.3) | 88 (29.1) |
| Past smoker | 105 (36.0) | 100 (33.1) |