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Table 1 Predictors of impossible intubation. (forwards stepwise binary logistic regression analysis) Variables not shown in equation: Resident physician in internal medicine

From: Difficult intubation and outcome after out-of-hospital cardiac arrest: a registry-based analysis

  Regression-coefficient SE P-value OR (95 % CI)
Gender male 0.82 0.24 p = 0.001 2.28 (1.43–3.63)
Age < 80 years 0.78 0.28 p = 0.005 2.18 (1.26–3.76)
presumed etiology    p = 0.034  
presumed etiology – trauma 0.80 0.40 p = 0.046 2.22 (1.01–4.85)
presumed etiology – hypoxia 0.49 0.27 p = 0.067 1.63 (0.97–2.74)
board certified physician in Anesthesia −0.43 0.20 p = 0.028 0.65 (0.44–0.96)
constant −5.22 0.32 p < 0.001