Table 1

Summary of online databases and keywords used in this study

DatabasesKeywords
ClinPSYCHParamedic
AmedEmergency medical technician
CINAHLEMT (emergency medical technician)
PubMedEMS (emergency medical services)
MedlineAmbulance service
HealthStarAmbulance
PILOTSStress
Cochrane LibraryPTSD
Effective Health-Care BulletinsP.T.S.D.
Effectiveness MattersPost traumatic stress disorder
Health Evidence Bulletins WalesCritical incident
Critical incident stress debriefing