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Table 4 Results in patients with out of hospital cardiac arrest

From: A systematic review of controlled studies: do physicians increase survival with prehospital treatment?

Number of patients in intervention group Physicians increase survival Not significant Physicians decrease survival
<100 Dickinson et al., 1997 (n = 9) (Mitchell et al., 1997 (n < 100))  
  Soo et al., 1999 (n = 38 et 37)   
  Sipria et al., 2000 (n = 70)   
  Frandsen et al., 1991 (n = 85)   
100–1.000    
>1.000    
  1. For studies with subgroup analysis only subgroup results are displayed