Fig. 2
From: Cabin temperature during prehospital patient transport – a prospective observational study
Cold exposure in ground and HEMS missions. Patient exposure for unfavourably low temperature during transport was calculated as the sum of numerical deviations from a chosen “neutral” temperature of 18 °C, minute by minute, in 5 (a), 10 (b) and 15 min (c) after transport started. This calculated figure was termed “cold exposure”. The results are shown as box plots for the three ground and air ambulances and four seasons. The boxes contain the inter-quartile difference with the median. HEMS: helicopter emergency medical service, GA1 and GA2: ground ambulance 1 and 2