Table 6

 Retrospective optimal ratio and sample size calculation for the comparison of on-scene times for physician–paramedic partnerships and conventional paramedic crews with regard to missions flown to road-traffic collisions, other trauma calls, medical emergencies, entrapment incidents and non-entrapped patients with trauma

Comparison of PPP and CPCActual ratioOptimal ratioActual sampleOptimal sample
CPC, conventional paramedic crew; OTC, other trauma call; PPP, physician–paramedic partnerships; RTC, road traffic collision.
Medical emergencies1.5622346
Entrapment incidents8.6712926
Non-entrapped patients1.561.3151428