Table 2 Adjusted odds ratios of prehospital variables for 1-month outcomes in unmatched patients (n = 386,535)

 2014 (vs. 2013)

1.04 (0.99–1.09)

1.03 (0.96–1.10)

 2015 (vs. 2013)

1.10 (1.05–1.15)

1.12 (1.05–1.20)

 2016 (vs. 2013)

1.15 (1.10–1.21)

1.23 (1.15–1.31)

 Rural area* (vs. urban area)

1.03 (0.99–1.07)

1.02 (0.96–1.07)

 Age^†

0.97 (0.97–0.97)

0.96 (0.96–0.97)

Men (vs. women)

1.07 (1.03–1.11)

1.22 (1.16–1.29)

 Family member

3.96 (3.80–4.13)

4.16 (3.91–4.42)

 Nonfamily member

4.86 (4.65–5.08)

5.49 (5.16–5.85)

Initial shockable rhythm (vs. initial nonshockable rhythm)

7.31 (7.03–7.60)

9.17 (8.70–9.65)

Presumed cardiac cause (vs. noncardiac causes)

0.79 (0.76–0.82)

1.37 (1.29–1.46)

Bystander CPR (vs. no bystander CPR)

1.16 (1.12–1.19)

1.41 (1.34–1.48)

Use of advanced airway management (vs. no use of airway management)

0.69 (0.67–0.72)

0.42 (0.40–0.44)

Epinephrine administration (vs. no use of epinephrine)

0.81 (0.77–0.84)

0.40 (0.37–0.43)

Call-to-response time^†

0.91 (0.90–0.91)

0.90 (0.89–0.90)

Call-to-hospital arrival time^†

0.99 (0.99–1.00)

1.00 (0.99–1.00)