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Table 4 Comparison of adjusted odds ratios of subsequent shock delivery for improving outcomes in previous studies a

From: Prognostic implications of conversion from nonshockable to shockable rhythms in out-of-hospital cardiac arrest

Study Year of publication n Endpoint Proportion of patients with conversion to shockable rhythm Shock delivery timeb, mean (SD), min Adjusted OR 95% CI
Hallstrom et al. [10] 2007 738 Survival to hospital discharge 22.2% 21.0 (8.1)c 0.18 Unknown (P =0.036)
Herlitz et al. [11] 2008 22,465 1-month survival 26% Unknown 1.96 1.49 to 2.56
Kajino et al. [12] 2008 12,353 1-month CPC 1 or 2 4.8% 12.3 (6.9) 4.3 2.8 to 6.7
Olasveengan et al. [13] 2009 751 Survival to hospital discharge 13.0% Unknown 3.02 1.07 to 8.57
Thomas et al. [14] 2013 6,556 Survival to hospital discharge 18.9% Unknown 0.89 0.55 to 1.45
  1. aCI, Confidence interval; CPC, Cerebral Performance Categories scale; OR, Odds ratio; SD, Standard deviation. bTime from the initiation of cardiopulmonary resuscitation by emergency medical services personnel to the first defibrillation. cNumbers were calculated using data from the original papers.