Table 2.

Association between time to bystander CPR and survival to hospital discharge.

Time to First CPR (mins)	Unadjusted Rate	Adjusted OR* (95% CI)	P-value	P for Trend
Entire study cohort
0–1	22.4%	Reference	Reference	<0.001
2–3	20.5%	0.91 (0.87–0.95)	<0.001
4–5	16.4%	0.73 (0.68–0.77)	<0.001
6–7	16.2%	0.73 (0.67–0.80)	<0.001
8–9	15.0%	0.68 (0.61–0.76)	<0.001
10+	10.5%	0.51 (0.47–0.55)	<0.001
Home location
0–1	15.4%	Reference	Reference	<0.001
2–3	15.4%	0.94 (0.88–1.00)	0.047
4–5	13.3%	0.80 (0.74–0.86)	<0.001
6–7	13.3%	0.79 (0.71–0.87)	<0.001
8–9	12.4%	0.73 (0.64–0.83)	<0.001
10+	8.8%	0.54 (0.49–0.60)	<0.001
Public location
0–1	39.1%	Reference	Reference	<0.001
2–3	36.1%	0.90 (0.83, 0.97)	0.006
4–5	28.4%	0.64 (0.58, 0.71)	<0.001
6–7	28.8%	0.66 (0.57, 0.78)	<0.001
8–9	26.8%	0.61 (0.50, 0.75)	<0.001
10+	20.3%	0.45 (0.39, 0.53)	<0.001

^*Models adjusted for age, sex, race, arrest location (public versus home), cardiac arrest etiology (cardiac versus non-cardiac), and urbanicity.

Abbreviations: CPR, cardiopulmonary resuscitation; OR, odds ratio; CI, confidence interval.