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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.