Table 2. Features, interventions, and outcomes of cardiac arrest events.

Variables	All patients (n = 678)	Targeted temperature management (n = 22)	Standard care (n = 656)	p-value
Arrest at night, n (%)	419 (61.8)	12 (54.5)	407 (62.0)	0.51
Arrest on weekend, n (%)	201 (29.6)	3 (13.6)	198 (30.2)	0.10
Arrest location, n (%)				<0.001
Intensive care unit	259 (38.2)	0 (0)	259 (39.5)
General ward	349 (51.5)	6 (27.3)	343 (52.3)
Emergency department	46 (6.8)	16 (72.7)	30 (4.6)
Other locations	24 (3.5)	0 (0)	24 (3.7)
Witnessed arrest, n (%)	441 (65.0)	15 (68.2)	426 (64.9)	0.82
Monitored status, n (%)	371 (54.8)	9 (40.9)	362 (55.3)	0.20
Shockable rhythm, n (%)	93 (13.7)	4 (18.2)	89 (13.6)	0.53
Critical care interventions in place at time of arrest, n (%)
Mechanical ventilation	120 (17.7)	1 (4.5)	119 (18.1)	0.15
Antiarrhythmics	49 (7.2)	0 (0)	49 (7.5)	0.39
Vasopressors	245 (36.1)	1 (4.5)	244 (37.2)	0.001
Dialysis	52 (7.7)	1 (4.5)	51 (7.8)	> 0.99
Pulmonary artery catheter	7 (1.0)	0 (0)	7 (1.1)	> 0.99
Intra-aortic balloon pumping	7 (1.0)	0 (0)	7 (1.1)	> 0.99
CPRa duration, min (SDb)	20.3 (19.2)	16.1 (10.6)	20.4 (19.4)	0.72
Body temperature during the first 24 hours after sustained ROSCc
Fever,d n (%)	173 (25.5)	3 (13.6)	170 (25.9)	0.32
Highest body temperature, °C (SD)	37.1 (1.6)	36.3 (1.3)	37.2 (1.6)	< 0.001
Lowest body temperature, °C (SD)	35.4 (1.4)	32.1 (1.0)	35.5 (1.3)	< 0.001
Percutaneous coronary intervention after sustained ROSC, n (%)	18 (2.7)	2 (9.1)	16 (2.4)	0.11
Withdrawal of life sustaining therapy	0 (0)	0 (0)	0 (0)	> 0.99
Survival to hospital discharge, n (%)	144 (21.2)	9 (40.9)	135 (20.6)	0.03
Favourable neurological outcome, n (%)	60 (8.8)	7 (31.8)	53 (8.8)	0.002

^aCPR, cardiopulmonary resuscitation

^bSD, standard deviation

^cROSC, return of spontaneous circulation

^dFever was defined as body temperature ≥ 38°C at least once during the first 24 hours after sustained ROSC.