Table 2.

Demographic data, baseline characteristics and outcome of patients with OHCA included in Silesian Registry of Out-of-Hospital Cardiac Arrest.

Variable	Whole population (n = 390)	Percentage of cases with missing data
Age [years]	66 [56–77]	3.8
Sex:		0
Male	262 (67.2)
Female	128 (32.8)
OHCA etiology:		1.5
Medical	299 (77.9)
Asphyxial	44 (11.5)
Traumatic	9 (2.3)
Other	32 (8.3)
Location of OHCA:		0.2
Home/residence	282 (72.5)
Public space	64 (16.5)
Other	43 (11.1)
Response time [min]	8 [6–11]	1.3
EMS witnessed OHCA	69 (17.9)	0
Bystander CPR	186 (47.9)	0.5
Comorbidities:		0
Previous MI	51 (13.1)
Previous stroke	37 (9.5)
Malignancies	27 (6.9)
Previously implanted cardioverter-defibrillator	4 (1.0)	0
First monitored rhythm:		4.6
VF/pulseless VT	96 (25.8)
Asystole/PEA	276 (74.2)
12-lead ECG performed after ROSC	54 (41.2)	0
Presence of STEMI	16 (29.6)	58.8
Patients who met the Utstein comparator group criteria (bystander witnessed CA with an initial shockable rhythm)	77 (19.7)	7.4
ROSC (whole population)	131 (35.1)	4.4
Status of patients on hospital admission (whole population):		0
Died before hospital admission	278 (71.3)
Admission to hospital with ROSC	101 (25.9)
Admission to hospital during ongoing CPR	11 (2.8)
ROSC (Utstein comparator group)	39 (51.3)	1.3
Status of patients on hospital admission (Utstein comparator group):		0
Died before hospital admission	45 (58.4)
Admission to hospital with ROSC	31 (40.3)
Admission to hospital during ongoing CPR	1 (1.3)

Dichotomous variables are presented as number of cases (percentage). Continous variables are presented as median (intequartile range); CA — cardiac arrest; CPR — cardiopulmonary resuscitation; ECG — electrocardiography; OHCA — out-of-hospital cardiac arrest; MI — myocardial infarction; PEA — pulseless electrical activity; ROSC — return of spontaneous circulation; STEMI — ST-elevation myocardial infarction; VF — ventricular fibrillation; VT — ventricular tachycardia