Risk factors of mortality and severe disability in the patients with cerebrovascular diseases treated with perioperative mechanical ventilation

Table 1 Basic demographic information of the patients

Characteristic	Number
Age (mean ± SD)	55.46 ± 12.53
Preoperative GCS score, median (IQR)	9 (8, 15)
Male gender, n (%)	59 (53.15)
Smoking, n (%)
Yes	34 (30.63)
Hypertension, n (%)
Yes	80 (72.07)
Diabetes, n (%)
Yes	18 (16.22)
Diagnosis of neurovascular diseases, n (%)
Ischemic cerebrovascular disease	1 (0.90)
Hemorrhagic cerebrovascular disease	96 (86.48)
Brain tumor	4 (3.60)
Malformed or narrowed intracerebral blood vessels	10 (9.01)
SAH grading, n (%)
Non-SAH	62 (55.86)
I	12 (10.81)
II	13 (11.71)
III	18 (16.22)
IV	6 (5.41)
Surgical operation methods, n (%)
Aneurysm clipping	29 (26.13)
Aneurysm embolization	23 (20.72)
Craniotomy for hematoma removal	30 (27.03)
External ventricular drainage	12 (10.81)
Cranial drilling and drainage	8 (7.21)
Others	9 (8.11)
Mechanical ventilation time, median (IQR)	113 (69, 187)
Tracheotomy, n (%)
Yes	56 (50.45)
Time from admission to start using ventilator (h), median (IQR)	40 (4, 86)
Ventilation initiation, n (%)
Post-operation	94 (84.68)
Pre-operation	17 (15.32)
Operation hours (h), median (IQR)	3.3 (2.1, 4.7)
Reason for ventilation, n (%)
Pulmonary disease	55 (49.55)
Status epilepticus	9 (8.11)
Impaired respiratory center function	6 (5.41)
Shock	14 (12.61)
Brainstem compression	27 (24.32)

SAH: Subarachnoid hemorrhage; GCS: Glasgow coma scale; IQR: Interquartile range.