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Table 2 Linear Regression Models on Duration of HHO Missions

From: Incidence and challenges of helicopter emergency medical service (HEMS) rescue missions with helicopter hoist operations: analysis of 11,228 daytime and nighttime missions in Switzerland

Variable Multivariate Adjusted Univariate Analysis
Estimate 95 % -C.I. p-value Estimate 95 % - C.I. p-value
Night mission 10.76 8.54 to 12.98 < 0.001 12.72 10.34 to 15.10 < 0.001
Trauma 8.93 7.26 to 10.60 < 0.001 6.36 4.58 to 8.15 < 0.001
Intubation 13.00 8.68 to 17.32 < 0.001 27.30 23.65 to 30.96 < 0.001
NACA 4 15.10 13.84 to 16.37 < 0.001 15.02 13.74 to 16.30 < 0.001
NACA 5 19.81 17.24 to 22.39 < 0.001 23.19 20.92 to 25.46 < 0.001
NACA 6 17.50 10.84 to 24.16 < 0.001 24.06 18.08 to 30.05 < 0.001
  1. Complete case analysis of 6,427 patients (excluded from the analysis were patients with NACA 0 and 7). Unit of estimates: minutes. Fit of the multivariate model: p < 0.001, Adj. R = 0.148. Night mission: day missions served as the reference group
  2. Trauma: Medical diagnosis served as the reference group. NACA NACA was analysed as a factor variable, scores 1–3 were merged and served as the reference group