Fig. 3From: Incidence and challenges of helicopter emergency medical service (HEMS) rescue missions with helicopter hoist operations: analysis of 11,228 daytime and nighttime missions in SwitzerlandLinear regression models on duration of HHO-Missions. Visualisation of the multivariable and univariate linear regression models as presented in Table 2. Estimates are in minutes. Reading Example: Intubation prolonged the total mission time by 27 min. (95 % CI 24–31 min.) in the univariate analysis; adjusted for trauma, nighttime mission and NACA score intubation prolonged the overall mission time by 13 min. (9–17 min.) Back to article page