Results of the multivariate logistic regression model exploring the independent risk factors associated with mortality in different subgroups
| Hematoma Volume20–<40 mL (n=112) | Hematoma Volume=≥40–<80 mL (n=253) | Hematoma Volume ≥80 mL (n=96) | |||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | ||
| Surgical methods (reference is EE) | SA | 2.251 | 0.262 to 19.342 | 2.438 | 1.101 to 5.402 | 66.532 | 6.345 to 697.675 |
| OC | 2.023 | 0.101 to 40.664 | 1.828 | 0.547 to 6.114 | 8.721 | 0.933 to 81.551 | |
| Gender (reference is female) | Male | 0.835 | 0.290 to 2.402 | NA | NA | NA | NA |
| Consciousness (reference is drowsy) | Lethargic | NA | NA | 1.058 | 0.345 to 3.246 | NA | NA |
| Light coma | NA | NA | 3.643 | 1.311 to 10.125 | NA | NA | |
| Deep coma | NA | NA | 7.023 | 1.768 to 27.896 | NA | NA | |
| Smoking (reference is yes) | No | NA | NA | 1.273 | 0.599 to 2.708 | NA | NA |
| Herniation (reference is no) | Yes | NA | NA | 1.902 | 0.714 to 5.062 | 2.698 | 0.804 to 9.052 |
| Interval between onset and operation (hours) (reference is >8) | ≤8 | NA | NA | 1.492 | 0.721 to 3.087 | NA | NA |
| Decompressive craniectomy (reference is no) | Yes | NA | NA | 0.805 | 0.264 to 2.451 | 1.523 | 0.418 to 5.547 |
| Tracheotomy (reference is no) | Yes | NA | NA | 0.691 | 0.285 to 1.674 | NA | Na |
| Lumbar puncture (reference is no) | Yes | NA | NA | 0.585 | 0.252 to 1.356 | 0.175 | 0.039 to 0.786 |
EEE, endoscopic evacuation; NA, not applicable; OC, open craniotomy; SA, stereotactic aspiration.