Table 2.

Regional survival rate of OHCA patients presenting to EDs in United States.

	Northeast		Midwest		South		West		Total
	N	Percent survived (95% CI)	N	Percent survived (95% CI)	N	Percent survived (95% CI)	N	Percent survived (95% CI)	N	Percent survived (95% CI)
Month of admission
January	95	3.9 (2.7–5.6)	233	6.8 (5.2–8.7)	148	3.5 (2.5–4.8)	157	7.4 (5.5–9.8)	633	5.2 (4.4–6.0)
February	111	5.2 (3.6–7.3)	173	6.4 (4.8–8.6)	118	3.5 (2.5–4.9)	122	6.6 (4.8–9.1)	524	5.2 (4.4–6.1)
March	91	4.6 (3.1–6.8)	163	5.6 (4.1–7.5)	159	4.7 (3.6–6.3)	153	7.7 (5.8–10.2)	566	5.5 (4.7–6.5)
April	120	6.0 (4.3–8.4)	197	7.6 (5.7–10.0)	131	3.5 (2.6–4.7)	160	8.7 (6.6–11.4)	607	6.0 (5.1–6.9)
May	117	5.7 (4.0–8.0)	185	6.7 (5.1–8.8)	132	4.0 (2.9–5.5)	120	6.4 (4.6–8.8)	554	5.6 (4.8–6.5)
June	133	6.8 (5.0–9.2)	168	7.2 (5.3–9.7)	169	5.4 (4.0–7.2)	166	9.2 (7.0–12.0)	636	6.9 (5.9–8.0)
July	91	4.9 (3.4–7.1)	164	6.7 (4.9–9.1)	165	5.0 (3.8–6.7)	174	9.6 (7.4–12.3)	594	6.3 (5.4–7.3)
August	94	5.0 (3.4–7.2)	159	6.7 (4.9–9.0)	150	4.5 (3.3–6.1)	151	8.9 (6.7–11.5)	554	6.0 (5.1–6.9)
September	65	3.5 (2.2–5.6)	141	5.9 (4.2–8.1)	154	5.2 (3.8–6.9)	156	8.8 (6.6–11.6)	516	5.7 (4.9–6.7)
October	96	4.9 (3.3–7.0)	159	5.7 (4.2–7.7)	158	4.6 (3.5–6.2)	111	5.7 (4.2–7.9)	524	5.2 (4.4–6.1)
November	92	4.0 (2.7–5.9)	194	6.5 (4.9–8.6)	172	4.7 (3.5–6.2)	157	8.1 (6.2–10.5)	615	5.7 (4.9–6.6)
December	81	3.1 (2.1–4.7)	186	5.8 (4.3–7.6)	142	3.4 (2.5–4.5)	157	7.2 (5.4–9.4)	567	4.6 (4.0–5.4)

EDs = emergency departments, OHCA = out of hospital cardiac arrest