. Author manuscript; available in PMC: 2010 Dec 22.

Published in final edited form as: J Am Coll Cardiol. 2010 Apr 20;55(16):1713–1720. doi: 10.1016/j.jacc.2009.11.077

Table 2.

Multivariate Analysis of Survival by Site: Cases With Complete Data Only

	n	AED Applied Before EMS	Adjusted OR^* (95% CI)
Alabama	119	5	NA
Dallas, Texas	423	8	NA
Iowa	452	32	0.69 (0.21–2.31)
Milwaukee, Wisconsin	957	19	4.85 (1.58–14.84)
Ottawa, Ontario, Canada	2,204	46	1.78 (0.66–4.81)
Pittsburgh, Pennsylvania	440	38	1.21 (0.33–4.43)
Portland, Oregon	548	17	1.72 (0.49–6.10)
Seattle/KC, Washington	1,316	27	0.99 (0.38–2.57)
Toronto, Ontario, Canada	3,010	41	3.65 (1.63–8.18)
Vancouver, British Columbia, Canada	1,901	20	1.51 (0.55–4.19)
Overall	11,370	253

Versus no AED applied.

CI = confidence interval; KC = King County; NA = not available; OR = odds ratio; other abbreviations as in Table 1.