Table 3. Univariable and multivariable logistic regression model for ALS attempt prediction.

	Univariable logistic regression for ALS attempt			Multivariable logistic regression for ALS attempt
Variable	OR	95%CI	p	OR	95%CI	Wald	p
Age (years)	0.97	0.97–0.98	<0.001	0.97	0.96–0.98	43.6	<0.001
Female gender	0.97	0.95–0.99	0.02	0.98	0.96–1	1.8	0.18
Non-shockable presenting rhythm	0.13	0.1–0.2	<0.001	0.24	0.14–0.42	26.6	<0.001
Unwitnessed event	0.23	0.2–0.3	<0.001	0.35	0.26–0.48	44.6	<0.001
EMS arrival time (min)	0.95	0.94–0.97	<0.001	0.97	0.94–0.99	9.2	0.002
No bystander CPR	0.26	0.19–0.34	<0.001	0.58	0.42–0.78	11.4	0.001
Medical etiology	1.1	0.71–1.66	0.69
Suspected or confirmed COVID-19 infection	0.83	0.55–1.3	0.4