Table 1 Characteristic of the hospitals in each group

Institutions, n

29

28

29

Number of beds

604.0 (460.0–800.0)

624.0 (470.8–758.2)

605.0 (520.0–768.0)

0.712

Number of ICU beds

10.0 (6.0–14.0)

9.5 (6.0–18.5)

12.0 (8.0–19.0)

0.152

Critical care medical center

16 (55.2%)

21 (75.0%)

29 (100.0%)

< 0.001

Number of all OHCA patients delivered in the last 1 year

70.0 (31.0–106.0)

123.5 (95.0–150.0)

230.0 (158.0–320.0)

< 0.001

Number of hospitalized OHCA of cardiac origin patients per year

4.0 (2.2-5.0)

10.7 (9.4-12.0)

22.8 (18.5-32.1)

< 0.001

 Day shift

0.210

  One doctor, n (%)

2 (6.9%)

0 (0.0%)

1 (3.4%)

  Two doctors, n (%)

6 (20.7%)

2 (7.1%)

2 (6.9%)

   ≥ 3 doctors, n (%)

21 (72.4%)

26 (92.9%)

26 (89.7%)

0.018

  One doctor, n (%)

6 (20.7%)

1 (3.6%)

1 (3.4%)

  Two doctors, n (%)

13 (44.8%)

11 (39.3%)

6 (20.7%)

   ≥ 3 doctors, n (%)

10 (34.5%)

16 (57.1%)

22 (75.9%)

0.379

 Day shift

  One nurse, n (%)

2 (6.9%)

2 (7.1%)

6 (20.7%)

  Two nurses, n (%)

11 (37.9%)

11 (39.3%)

12 (41.4%)

   ≥ 3 nurses, n (%)

16 (55.2%)

15 (53.8%)

11 (37.9%)

0.606

  One nurse, n (%)

10 (34.5%)

6 (21.4%)

8 (27.6%)

  Two nurses, n (%)

10 (34.5%)

13 (46.4%)

15 (51.7%)

   ≥ 3 nurses, n (%)

9 (31.0%)

9 (32.2%)

6 (20.7%)

 Emergency Physician, n (%)

27 (93.1%)

27 (96.4%)

29 (100.0%)

0.152

 Intensivist, n (%)

23 (79.3%)

20 (71.4%)

26 (89.7%)

0.323

 Anesthesiologist, n (%)

25 (86.2%)

25 (89.3%)

21 (72.4%)

0.166

 Cardiologist, n (%)

25 (86.2%)

27 (96.4%)

27 (93.1%)

0.337

ECMO-capable hospitals, n (%)

26 (89.7%)

27 (96.4%)

29 (100.0%)

0.061