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Table 3 Logistic regression analyses for 1-month outcomes for bystander-witnessed OHCAs and those with initial cardiac VF

From: Collaborative effects of bystander-initiated cardiopulmonary resuscitation and prehospital advanced cardiac life support by physicians on survival of out-of-hospital cardiac arrest: a nationwide population-based observational study

  1-month survival Good performance at 1 month Vegetative status or de facto brain death at 1 month
  OR 95% CI P OR 95% CI P OR 95% CI P
All bystander-witnessed OHCAs          
   Age (10-year increase) 0.87 0.86 to 0.89 < 0.001 0.78 0.76 to 0.79 < 0.001 0.96 0.95 to 0.98 < 0.001
   Sex          
Male Ref.    Ref.    Ref.   
Female 1.04 0.99 to 1.10 0.109 0.93 0.84 to 1.01 0.094 1.12 1.04 to 1.21 0.004
   Call to EMS response (minutes) 0.90 0.89 to 0.91 < 0.001 0.87 0.86 to 0.89 < 0.001 0.93 0.92 to 0.94 < 0.001
   Causes of arrest          
Noncardiac origin Ref.    Ref.    Ref.   
Cardiac origin with initial non-VF 0.65 0.62 to 0.69 < 0.001 1.12 1.00 to 1.25 0.050 0.54 0.49 to 0.59 < 0.001
Cardiac origin with initial VF 3.57 3.37 to 3.79 < 0.001 6.41 5.82 to 7.07 < 0.001 1.66 1.51 to 1.82 < 0.001
   Combination of BCPR and ACLS          
ACLS by ELSTs without BCPR Ref.    Ref.    Ref.   
ACLS by ELSTs with BCPR 1.51 1.43 to 1.59 < 0.001 2.23 2.05 to 2.42 < 0.001 1.09 1.02 to 1.18 0.018
ACLS by physicians without BCPR 1.63 1.39 to 1.92 < 0.001 1.18 0.86 to 1.61 0.317 1.87 1.52 to 2.32 < 0.001
ACLS by physicians with BCPR 2.17 1.89 to 2.49 < 0.001 2.80 2.28 to 3.43 < 0.001 1.45 1.17 to 1.80 0.001
Bystander-witnessed OHCAs with initial VF of cardiac origin          
   Age (10-year increase) 0.85 0.83 to 0.86 < 0.001 0.79 0.77 to 0.81 < 0.001 0.99 0.95 to 1.03 0.669
   Sex          
Male Ref.    Ref.    Ref.   
Female 1.17 1.07 to 1.27 < 0.001 1.09 0.97 to 1.22 0.137 1.14 0.99 to 1.32 0.076
   Call to EMS response (minutes) 0.90 0.89 to 0.91 < 0.001 0.90 0.88 to 0.92 < 0.001 0.93 0.91 to 0.95 < 0.001
   Combination of BCPR and ACLS          
ACLS by ELSTs without BCPR Ref.    Ref.    Ref.   
ACLS by ELSTs with BCPR 1.18 1.09 to 1.26 < 0.001 1.30 1.18 to 1.43 < 0.001 1.00 0.88 to 1.14 0.993
ACLS by physicians without BCPR 1.87 1.49 to 2.34 < 0.001 1.60 1.20 to 2.14 0.002 1.56 1.09 to 2.24 0.016
ACLS by physicians with BCPR 2.10 1.72 to 2.56 < 0.001 2.06 1.62 to 2.63 < 0.001 1.28 0.90 to 1.83 0.167
  1. Logistic regression analyses for 1-month outcomes for all the bystander-witnessed out-of-hospital cardiac arrests (OHCAs) (n = 95,072) and those with initial ventricular fibrillation (VF) of cardiac origin (n = 11,970). ACLS, advanced cardiac life support; BCPR, bystander-initiated cardiopulmonary resuscitation; CI, confidence interval; ELST, emergency life-saving technician; EMS, emergency medical service; OR, odds ratio; Ref., reference.