Table 2

Risk factors for significant anaesthetic events (SAEs) from multivariate conditional regression

SAE class (number of events/total) explaining variablesOdds ratio95% CIp value
UAE = undesirable anaesthetic event; CAE = critical anaesthetic event.
Process UAE (325/6439)
Outcome UAE 2.01.5 to 2.70.0001
Risk of difficult intubation 4.73.3 to 6.50.0001
Outcome UAE (1440/6439)
Process UAE 2.11.6 to 2.90.0001
Risk of difficult intubation 1.51.2 to 1.80.006
Risk of allergic reaction 1.41.1 to 1.60.001
Duration of the procedure
90–180 min 1.71.5 to 2.00.002
>180 min 2.92.5 to 3.50.0001
Process CAE (221/6439)
Outcome CAE14.85 to 440.005
Outcome UAE 3.42.5 to 4.60.0001
Risk of haemorrhage 2.81.4 to 5.30.001
Duration of the procedure
90–180 min 1.50.9 to 2.30.0003
>180 min 3.01.9 to 4.40.0001
Outcome CAE (26/6439)
Process CAE11.54.4 to 27.80.0001
Outcome UAE 4.82.0 to 11.80.0004
Process UAE 4.81.3 to 13.40.006