Primary outcome
The rate of successful intubation without physiological instability during all intubation attempts was significantly higher (p = 0.009) in the NIPPV group (64%) compared to the standard care group (42.7%). The primary outcome was also evaluated according to operator experience. It was revealed that the rate of successful intubation without physiological instability during all intubation attempts was higher in the NIPPV group (44.8%) compared to the standard care group (10.7%) when the intubation experience was less than 36 intubations (p = 0.004). However, when the intubation experience was above 35 intubations, no significant difference (p = 0.134) was observed between the groups in terms of the primary outcome (Table 2).