Table 2.

Demographic characteristics of the prolonged downtime out-of-hospital cardiac arrest patients treated with hypothermia

	All patients (n=35)	Good CPC (≤2) (n=8)	Poor CPC (≥3) (n=27)	p-value
Demographics
Age, years	60.0(44.0-77.0)	52.5(36.8-74.8)	60.0(53.0-77.0)	0.19
Male	25 (71.4)	6 (75.0)	19 (70.4)	1.00
Race (white)	29 (82.9)	8 (100.0)	21 (77.8)	0.34
Transferred	21 (60.0)	6 (75.0)	15 (55.6)	0.43
Co-morbidities
Hypertension	13 (37.1)	4 (50.0)	9 (33.3)	0.43
Diabetes mellitus	5 (14.3)	1 (12.5)	4 (14.8)	1.00
Coronary artery disease	4 (11.4)	1 (12.5)	3 (11.1)	1.00
No co-morbidities	8 (22.9)	1 (12.5)	7 (25.9)	0.65
Arrest characteristics
Location				0.63
Private/home	17 (48.6)	4 (50.0)	13 (48.1)
Public space	9 (25.7)	3 (37.5)	6 (22.2)
Others or unknown	9 (25.7)	1 (12.5)	8 (29.6)
Witnessed	21 (61.8)	4 (57.1)	17 (63.0)	1.00
Bystander CPR	21 (61.8)	4 (57.1)	17 (63.0)	0.68
Shockable rhythm	16 (45.7)	6 (75.0)	10 (37.0)	0.10
Initial vital signs
Systolic blood pressure, mmHg	111.9 ± 30.1	121.6 ± 28.7	153 ± 33.2	0.53
Diastolic blood pressure, mmHg	66.1 ± 22.0	77.0 ± 22.8	65.9 ± 22.0	0.38
Heart rate, beats per minute	93.5 ± 21.5	92.5 ± 25.2	98.3 ± 26.7	0.50
Initial laboratory values
Lactate, mmol/L	7.2 ± 3.5	5.2 ± 2.8	7.4 ± 3.4	0.02
Sodium, mmol/L	140.3 ± 3.9	138.8 ± 3.2	140.1 ± 3.4	0.89
Potassium, mmol/L	4.5 ± 1.0	4.1 ± 0.9	4.6 ± 1.1	0.38
Glucose, mmol/L	12.9 ± 5.0	12.2 ± 5.1	13.9 ± 7.2	0.76
APACHEII score (24 hr)	25.5 ± 5.5	22.7 ± 6.0	26.4 ± 5.1	0.13

Values are expressed as mean ± SD and n (%). Statistical analysis was performed by Mann-Whitney U test or Fisher’s s exact test.

CPR, cardiopulmonary resuscitation; WBC, White blood cell count; APACHE II, acute physiology and chronic health evaluation II