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Table 3 Results in trauma patients

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 (Suominen et al., 1998 (n = 25)) Di Bartolomeo et al., 2005 (n = 56)  
  Nardi et al., 1994 (n = 42) Iirola et al., 2006 (n = 81)  
  Garner et al., 1999 (n = 67) Di Bartolomeo et al., 2001 (n = 92)  
  Schwartz et al., 1990 (n = 93)   
100–1.000 (Frankema et al., 2004 (n = 103)) Hamman et al., 1991 (n = 145) Graf et al., 1993 (n = 107)
  Osterwalder, 2003 (n = 196) Schmidt et al., 1992 (n = 221) (Lee et al., 2003 (n = ?))
  Oppe et al., 2001 (n = 210) Ringburg et al., 2007 (n = 260) Liberman et al., 2003 (n = 801)
  (Nichool et al./Younge et al., 1997)   
>1.000 Roudsari et al., 2007 (n = 14.702) Lechleutner et al., 1994 (n = 2.013)  
  1. For studies with subgroup analysis only subgroup results are displayed