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Table 1 Characteristic of the hospitals in each group

From: Effect of annual hospital admissions of out-of-hospital cardiac arrest patients on prognosis following cardiac arrest

  Low-Volume Hospital Middle-Volume Hospital High-Volume Hospital P-value
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
Number of doctors in the treatment of cardiac arrest cases at emergency department
 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%)  
 Night/holiday shift 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%)  
Number of nurses in the treatment of cardiac arrest cases at emergency department 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%)  
 Night/holiday shift 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%)  
Availability of medical specialists in hospital
 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
  1. Data are presented as the median (25th-75th percentile), percentage, or numbers
  2. ECMO extra corporeal membrane oxygenation, ICU intensive care unit, OHCA out-of-hospital cardiac arrest