Table 2:

Pooled patient characteristics

	All studies	Studies of patients with TBI	Studies of patients with stroke
Age (years) *	59.6 (1.2)	52.84 (2.39)	61.1(0.52)
Female (%) **	38.9 (4.4)	23.78 (1.24)	45.42 (0.84)
GCS on admission ***	4.4 (0.8)	4.27 (0.84)	5.92 (1.73)
Timing of Tracheostomy (Day) ****	12 (2.3)	12.5 (1.59)	12 (2.80)

Data are mean (SD). GCS = Glasgow Coma Scale. TBI = Traumatic Brain Injury. Stroke = Acute Ischemic Stroke, Intracranial Hemorrhage, Aneurysmal Subarachnoid Hemorrhage.

^*Reported in 15 studies overall (n=16,512): 8 TBI studies, 5 stroke studies, and 2 mixed TBI/stroke cohort

^**Reported in 15 studies overall (n=19,567): 8 TBI studies, 5 stroke studies, and 2 mixed TBI/stroke cohort

^***Reported in 13 studies overall (n=6,157): 9 TBI studies, 2 stroke studies, and 2 mixed TBI/stroke cohort

^****Time from Initial Brain Injury to Tracheostomy Placement, Reported in 11 studies overall (n=16,162): 5 TBI studies, 4 stroke studies, and 2 mixed TBI/stroke cohort