Table 5

Subgroup analyses of the primary outcome: successful intubation on the first attempt

SubgroupConventional group N=50CMAC VL group N=50Absolute difference (95% CI)†Adjusted common ORs (95% CI)†P value
Body mass index
   <30
   ≥30
Mallampati score
   Scores I–II
   Scores III–IV
SOFA score
  <10
  ≥10
Rank of the operator
  Attending anaesthesiology >5 years
  Attending anaesthesiology ≤5 years
  Resident
 MACOCHA score
 0–3
 4–7
 8–12
Skill level of anaesthesiologist making first intubation attempt
 Expert (more than 50 intubations with videolaryngoscope)
 Non-expert (20–50 intubations with videolaryngoscope)
 Non-expert (less than intubations with videolaryngoscope)
Saturation oxygen at the moment when intubation is decided
 <80%
 ≥80%
Indication for intubation
 Acute respiratory failure
 Other
Difficult airway characteristics
 None
 ≥1

  • SOFA, Sequential Organ Failure Assessment.