Table 3.
Relationships between risk factors and SAH grade III–IV evident on CT scan
| Category | No. of patients | SAH grade III–IV on CT scan |
||
|---|---|---|---|---|
| N (%) | p value | |||
| Total cases | 370 | 216 (58) | ||
| Hunt-Hess grade | I–II | 202 | 84 (42) | < 0.0001 |
| III–IV | 168 | 132 (79) | ||
| Type of hemorrhage on CT scan * | SAH alone | 317 | 175 (55) | 0.0009 |
| ICH or/and IVH | 50 | 40 (80) | ||
| Rebleeding | Absent | 328 | 177 (54) | < 0.0001 |
| Present | 42 | 39 (93) | ||
| Cigarette smoking | Non-smoker | 202 | 115 (57) | 0.2662 |
| Current regular or former smokers | 148 | 93 (63) | ||
| Hypertension | Absent | 182 | 95 (52) | 0.0270 |
| Present | 179 | 114 (64) | ||
| Alcohol intake | Occasional or no drinking | 239 | 135 (56) | 0.1439 |
| Daily drinking | 108 | 70 (65) | ||
| WBC count | < 10,000/mm 3 | 157 | 77 (49) | 0.0017 |
| ≥ 10,000/mm 3 | 213 | 139 (65) | ||
| Serum glucose level | < 130 mg/dl | 80 | 29 (36) | < 0.0001 |
| ≥ 130 mg/dl | 285 | 183 (64) | ||
| QTc time (ms) on ECG | < 450 | 137 | 70 (51) | 0.0667 |
| ≥ 450 | 191 | 117 (61) | ||
| LVH on ECG | Absent | 224 | 119 (53) | 0.0209 |
| Present | 118 | 78 (66) | ||
| ST depression on ECG | Absent | 282 | 156 (55) | 0.0639 |
| Present | 60 | 41 (68) | ||
*Three patients with subdural hematoma are not included. CT: computed tomography, ECG: electrocardiogram, ICH: intracerebral hemorrhage, IVH: intraventricular hemorrhage, LVH: left ventricular hypertrophy, SAH: subarachnoid hemorrhage, WBC: white blood cell.