Skip to main content

Table 5 Results of logistic regression analysis: adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for the factors related to the number of defibrillation shocks

From: The number of prehospital defibrillation shocks and 1-month survival in patients with out-of-hospital cardiac arrest

Variables Odds ratio 95% CI
Age 1.01 (1.01–1.02)
Sex (0: female, 1: male) 0.84 (0.72–0.98)
Origin of OHCA (0: non cardiac, 1: cardiac) 0.54 (0.41–0.71)
Relationship between bystander and patient (family member), no. (%) 0.96 (0.85–1.09)
Chest compressions (0: no, 1: yes) 0.93 (0.81–1.06)
Rescue breathing (0: no, 1: yes) 0.97 (0.79–1.18)
Emergency life-saving technician in ambulance (0: no, 1: yes) 1.30 (0.83–2.03)
Advanced life support by MD (0: no, 1: yes) 0.69 (0.58–0.83)
Time from call to arrival at scene (min) 1.01 (0.99–1.03)
Time from call to arrival at hospital (min) 0.99 (0.99–1.00)
Use of ALS devices (0: no, 1: laryngeal mask/an adjunct airway/ tracheal tubes) 0.63 (0.55–0.73)
Epinephrine use (yes), no. (%) 0.37 (0.32-0.44)
Time from the first defibrillation to the first ROSC before hospital arrival (0: ≥2 min, 1: ≤1 min) 3.08 (2.38–3.99)
Hosmer–Lemeshow test, χ2 = 3.21 (p = 0.92)
  1. Note: The effects of the 47 prefectures in Japan were controlled for by introducing 46 dummy variables in the analysis.