Prognostic factors associated with hospital survival in comatose survivors of cardiac arrest

Table 2 Comparison of survivors and non-survivors

Variable	Died n = 376 (65%)	Survived n = 206 (35%)	P value
Patient
Age (yr) - mean (SD) (n = 581)	64 (17)	63 (15)	0.28
Gender (male) - n (%) (n = 579)	218 (58)	143 (70)	0.006
Cardiac arrest
Time to ROSC (min) - mean (SD) (n = 571)	26 (14.5)	18 (14.3)	< 0.001
Presenting rhythm (shockable) - n (%) (n = 582)	134 (36)	152 (72)	< 0.001
Location of arrest (OHCA) - n (%) (n = 582)	269 (72)	139 (67)	0.3
Apache 2 score - mean (SD) (n = 427)	30 (7.6)	24 (8.5)	< 0.001
Apache 3 score - mean (SD) (n = 427)	79 (37.9)	77 (37.8)	0.5
Management
Cooled - n (%) (n = 582)	178 (47)	117 (57)	0.03
Target temperature (°C) - median ( IQR) (n = 290)	33 (33-33)	33 (33-33)	0.44
Time to temp1 (h) - mean (SD) (n = 288)	1.8 (2.9)	2.5 (3.1)	0.04
Time at temp2 (h) - median (IQR) (n = 290)	24 (12-24)	24 (12-24)	0.84
Outcome
ICU LOS (d) - median (IQR) (n = 582)	2 (1- 4)	4 (2-7)	< 0.001
Hospital LOS (d) - median (IQR) (n = 581)	3 (1-6)	15 (8-27)	< 0.001

¹Time to temp = time taken to reach target temperature (hours);

²Time at temp = time at target temperature (hours). LOS: Length of stay (days); ROSC: Return of spontaneous circulation (minutes); OHCA: Out of hospital cardiac arrest; IQR: Interquartile range.