Table 3.

Adjusted Predictors of Resuscitation Outcomes.

Predictor	ROSC Odds ratio	ROSC at ED arrival Odds ratio	Survival to discharge Odds ratio
OD-OHCA Status	1.551 (1.353–1.779)	1.766 (1.491–2.091)	2.135 (1.722–2.647)
Age (in years)	1.004 (1.003–1.005)	1.005 (1.003–1.006)	0.982 (0.981–0.984)
Male	0.769 (0.735–0.805)	0.726 (0.687–0.768)	0.817 (0.752–0.888)
Public Location	1.216 (1.146–1.290)	1.030 (0.962–1.102)	2.007 (1.846–2.182)
VF/VT	2.884 (2.744–3.032)	2.212 (2.086–2.347)	7.516 (6.924–8.158)
Bystander CPR	1.100 (1.052–1.151)	1.073 (1.017–1.132)	1.140 (1.055–1.231)
Bystander Wit.	1.859 (1.786–1.936)	1.697 (1.616–1.784)	2.087 (1.947–2.238)
EMS Wit.	1.825 (1.499–2.220)	1.658 (0.734–3.744)	4.317 (3.194–5.834)
Site A	0.238 (0.200–0.283)	0.178 (0.147–0.215)	0.465 (0.343–0.632)
Site B	0.232 (0.207–0.261)	0.164 (0.143–0.188)	0.463 (0.377–0.568)
Site C	1.000 (–)	1.000 (–)	1.000 (–)
Site D	0.440 (0.407–0.475)	0.357 (0.325–0.393)	0.650 (0.565–0.746)
Site E	0.473 (0.441–0.507)	0.391 (0.358–0.426)	0.641 (0.564–0.727)
Site F	0.830 (0.759–0.907)	0.874 (0.783–0.975)	1.102 (0.953–1.274)
Site G	0.514 (0.463–0.570)	0.681 (0.595–0.778)	1.188 (0.992–1.424)
Site H	0.752 (0.679–0.833)	1.385 (1.203–1.595)	1.131 (0.944–1.355)
Site I	0.525 (0.466–0.591)	0.422 (0.364–0.488)	0.829 (0.675–1.018)
Site J	1.284 (1.188–1.388)	1.280 (1.159–1.414)	1.915 (1.685–2.177)

Abbreviations: CPR – cardiopulmonary resuscitation; ED – emergency department; EMS – emergency medical services; OD-OHCA – overdose out-of-hospital cardiac arrest; ROSC – return of spontaneous circulation; SD – standard deviation; VF/VT – ventricular fibrillation/ventricular tachycardia; Wit. – witnessed.