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Table 4 Multiple regression analysis: rated degree of difficulty

From: A comparison of airway management devices in simulated entrapment-trauma: a prospective manikin study

Predictor variable b SE t 95% CI p value
Time to first successful ventilation 0.08 0.01 7.38 0.06–0.10 < 0.001
Attempts required for successful placement 2.61 0.65 4.02 1.32–3.90 < 0.001
Constant − 1.92 0.73 − 2.64 − 3.37 to − 0.48 0.01
  1. N of obs. = 104 airway placements. F = 40.03. R2 = 0.44. Adjusted R2 = 0.43