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. Author manuscript; available in PMC: 2011 Feb 1.
Published in final edited form as: Resuscitation. 2009 Nov 25;81(2):175. doi: 10.1016/j.resuscitation.2009.10.021

Table 2.

Survival to hospital discharge by time block

Time block Number of Episodes Number (%)Survived Odds Ratios for Survival with 95% CIs
Unadjusted Adjusted
0001–0600 1428 105 (7.3%) - -
0601–1200 2887 219 (7.6%) 1.04 (0.80, 1.35) 0.99 (0.74, 1.34)
1201–1800 2877 277 (9.7%) 1.36 (1.05, 1.75) 1.08 (0.84, 1.54)
1801–2400 2475 202 (8.2%) 1.13 (0.87, 1.46) 0.96 (0.71, 1.29)

Unadjusted and adjusted odds ratios for survival to hospital discharge among 9,667 patients with out-of-hospital cardiac arrest. Unadjusted odds ratios were derived from a simple logistic regression model exploring the relationship between time block and survival to hospital discharge. Adjusted odds ratios were derived from a multiple logistic regression model adjusting for sex, age, initial rhythm, witness status, bystander CPR, bystander automated external defibrillator use, EMS response time and ROC site.

Abbreviations: CI = confidence interval