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Table 2 Relation of bystander to victim as a factor associated with 1-month survival of bystander-witnessed OHCAs having bystander CPR

From: Don't stop your heart in front of your family: family as a bystander is associated with poor outcome of bystander-witnessed, bystander-CPR-performed out-of-hospital cardiac arrest

  Adjusted odds ratio (95% confidence interval)
Factor Bystander-witnessed OHCAs with bystander CPR Of presumed cardiac etiology Of presumed cardiac etiology with shockable initial rhythm
Etiology of arrest    
   Presumed cardiac 1.39 (1.24 to 1.55) Undefined Undefined
   Noncardiac Reference   
Initial rhythm    
   Shockable 4.38 (3.95 to 4.85) 4.82 (4.29 to 5.42) Undefined
   Nonshockable Reference Reference Reference
Patient's age 0.97 (0.97 to 0.98) 0.97 (0.97 to 0.97) 0.98 (0.97 to 0.98)
Sex    
   Male 1.14 (1.02 to 1.26) 1.16 (1.02 to 1.32) 1.07 (0.90 to 1.26)
   Female Reference Reference Reference
Relation of bystander to victim    
   Family Reference Reference Reference
   Friend, colleague and passers-by 1.70 (1.49 to 1.95) 1.40 (1.19 to 1.64) 1.61 (1.42 to 1.81)
   Others 1.59 (1.42 to 1.78) 1.46 (1.27 to 1.68) 1.32 (1.10 to 1.59)