Demographic data
| All patients (n=151) | Successful ETI (n=142) | Tube malposition (n=9) | P value | |
| Age (years)* | 43±23, 40 (16–91) | 42±23, 36 (16–91) | 43±17, 43 (19–74) | 0.448 |
| Male gender, n (%) | 105 (69) | 93 (65) | 7 (78) | 0.321 |
| GCS* | 8±5, 7 (3–15) | 8±4, 7 (3–15) | 10±5, 12 (3–15) | 0.151 |
| AIS head* | 4±1, 4 (1–5) | 3±1, 3 (1–5) | 4±1, 3 (2–5) | 0.469 |
| ISS* | 31±17, 25 (4–75) | 30±17, 25 (4–75) | 40±18, 38 (16–66) | 0.053 |
| OST* (min) | 56±24, 51 (36–85) | 56±25, 51 (36–145) | 55±35, 36 (32–114) | 0.530 |
*Mean±SD, median (min-max).
AIS, Abbreviated Injury Scale; ETI, endotracheal intubation; GCS, Glasgow Coma Scale; ISS, Injury Severity Score; OST, on-scene time.