Table 2.
Vasospasm subgroup analysis: asymptomatic versus delayed cerebral ischemia
| Total N = 218 | Asymptomatic Vasospasm (n= 143) | Delayed Cerebral Ischemia (n=85) | p-value |
|---|---|---|---|
| Age in years (mean (SD)) | 52.6 (12.3) | 53.9 (12.1) | 0.438 |
| Race | 0.614 | ||
| White | 83 (71) | 113 (79) | |
| Black | 23 (20) | 19 (13) | |
| Other | 11 (9) | 11 (8) | |
| Sex (n (%)) | 0.445 | ||
| Female | 97 (68) | 52 (62) | |
| Male | 146 (32) | 33 (38) | |
| Tobacco use (n (%)) | 0.565 | ||
| Yes | 84 (59) | 54 (64) | |
| No | 59 (41) | 31 (36) | |
| Fisher grade (n (%)) | 0.636 | ||
| 1 | 0 (0) | 1 (1) | |
| 2 | 10 (7) | 6 (7) | |
| 3 | 18 (13) | 11 (13) | |
| 4 | 115 (80) | 67 (79) | |
| Hunt-Hess grade (n (%)) | 0.217 | ||
| 1 | 9 (6) | 6 (7) | |
| 2 | 32 (22) | 10 (12) | |
| 3 | 40 (28) | 21 (25) | |
| 4 | 42 (29) | 30 (35) | |
| 5 | 20 (14) | 18 (21) | |
| Initial treatment (n (%)) | 0.560 | ||
| Endovascular | 110 (78) | 68 (80) | |
| Open surgery | 30 (21) | 15 (18) | |
| Other | 2 (1) | 2 (1) | |
| Nimodipine use (n (%)) | -- | ||
| Yes | 142 (100) | 84 (100) | |
| No | 0 (0) | 0 (0) | |
| Maximum PaO2 (mean (SD)) | 240.5 (126.9) | 213.1 (113.2) | 0.102 |
| Minimum PaCO2 (mean (SD)) | 33.5 (6.4) | 33.9 (6.1) | 0.659 |