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. 2007 Jan;24(1):59–62. doi: 10.1136/emj.2006.038844

Table 3 Overall breakdown of trauma missions, mean on‐scene times with 95% confidence interval and associated p values for the comparison of entrapment versus non‐entrapment and road‐traffic collision versus other trauma call incidents.

Trauma on‐scene times Missions (n) Missions (%) Mean (min) 95% CI (min) Student's t test
Entrapment 29 16.1 44.5 8 p<0.001
Non‐entrapment 151 83.9 21.5 2
RTC 90 50 28.5 3.5 p = 0.006
OTC 90 50 22 2.5

OTC, other trauma calls; RTC, road traffic collision.