Table 5

 Retrospective optimal ratio and sample size calculation for the overall comparison of on-scene times for road traffic collisions compared with other trauma calls, entrapment compared with non-entrapment and prehospital rapid sequence induction (PRSI) compared with non-PRSI

Comparison overall of missionsActual ratioOptimal ratioActual sampleOptimal sample
RTC, road traffic collision; OTC, other trauma calls.
RTCs v OTCs10.5918045
Entrapment vnon-entrapment0.190.518031