This systematic review by Scandinavian authors examined controlled studies comparing physician with non-physician treatment in pre-hospital care. Fourteen of the 26 studies identified demonstrated significantly improved survival in the intervention (physician-treated) group. Most survival benefit has been demonstrated in trauma and cardiac arrest, reflecting the fact that these two areas are the most studied. The authors rightly remind us of the paucity of pre-hospital controlled studies of sufficient quality and strength.
A systematic review of controlled studies: do physicians increase survival with prehospital treatment?
Scand J Trauma Resusc Emerg Med. 2009 Mar 5;17(1):12