In a study of over 7500 patients with cardiac arrest transported by EMS in the United States, transport distance was not associated with survival on logistic analysis (OR 1.00; 95% CI 0.99–1.01).
A geospatial assessment of transport distance and survival to discharge in out of
hospital cardiac arrest patients: Implications for resuscitation centers
Resuscitation. 2010 May;81(5):518-23