Table 3.

Multivariable analysis: factors associated with SpO₂  <  97% during endotracheal intubation (ETI)

Variable	OR	95% CI	P value
Duration of ETI (seconds)	1.00	[1.00; 1.01]	0.0494
BMI  >  25 kg·m−2	1.73	[0.45; 6.65]	0.1295
Highest ORI during preoxygenation	0.76	[0.61; 0.95]	0.0141

OR odds ratio; 95% CI 95% confidence interval; ETI endotracheal intubation; BMI body mass index; ORI oxygen reserve index