Table 2.

Multivariable logistic regression analysis of out-of-hospital cardiac arrests in urban centres, and survival to discharge

Survival to discharge	Paramedic-treated patients
	N	Crude OR	95% CI	P	Adjusted OR	95% CI	P
Urban centre vs rural area	510	1.91	1.08, 3.38	0.026	2.07	1.11, 3.85	0.028
Large urban centre vs population centres and rural areas	510	1.97	1.14, 3.41	0.015	2.11	1.17, 3.82	0.029

Adjusted model used covariates of age, sex, bystander resuscitation, witness status, public vs non-public location, and presence of preceding symptoms. Rural areas have populations of < 1000 people. Urban centres have populations of ≥ 1000 people. Large urban centres have populations of ≥ 100,000 people. OR, odds ratio; CI, confidence interval.