Table 2 Characteristics of intubation procedures
| Â | Total | No collapse | Collapse | p-value |
|---|---|---|---|---|
| Â | (n = 885) | (n = 621) | (n = 264) | |
First intubation, n (%) | 543 (61.4) | 364 (58.6) | 179 (67.8) | 0.01 |
Anesthesiologist, n (%) | 580 (65.5) | 415 (66.8) | 165 (62.5) | 0.22 |
Fluid challenge, n (%) | 336 (38.0) | 229 (36.9) | 107 (40.5) | 0.33 |
SpO2 before ETI, mean ± SD | 87.72 ± 0.5 | 88.4 ± 0.6 | 86.13 ± 0.8 | 0.03 |
NIV (out of preoxygenation), n (%) | 324 (36.6) | 185 (29.8) | 139 (52.7) | <0.0001 |
Drug for induction, n (%) | 863 (97.5) | 605 (97.4) | 258 (97.7) | 0.79 |
 Nesdonal, n (%) | 25 (2.8) | 17 (2.7) | 8 (3.0) | 0.81 |
 Propofol, n (%) | 139 (15.7) | 111 (17.9) | 28 (10.6) | 0.01 |
 Dose mg/kg, mean ± SD | 2.13 ± 1.23 | 2.10 ± 1.23 | 2.27 ± 1.27 | 0.54 |
 Etomidate, n (%) | 421 (47.6) | 286 (46.1) | 135 (51.1) | 0.17 |
 Dose mg/kg, mean ± SD | 0.45 ± .44 | 0.47 ± 0.46 | 0.42 ± 0.41 | 0.37 |
 Ketamine, n (%) | 188 (21.2) | 124 (20.0) | 64 (24.2) | 0.16 |
 Dose mg/kg, mean ± SD | 2.77 ± 1.06 | 2.82 ± 1.10 | 2.66 ± 0.98 | 0.31 |
 Other, n (%) | 39 (4.4) | 24 (3.9) | 15 (5.7) | 0.23 |
Opioids, n (%) | 74 (8.4) | 53 (8.5) | 21 (8.0) | 0.78 |
 Fentanyl, n (%) | 8 (0.9) | 5 (0.8) | 3 (1.1) | 0.63 |
 Sufentanil, n (%) | 53 (6.0) | 42 (6.8) | 11 (4.2) | 0.14 |
 Remifentanil, n (%) | 9 (1.0) | 6 (1.0) | 3 (1.1) | 0.82 |
 Other, n (%) | 3 (0.3) | 3 (0.48) | 0 (0) | 0.26 |
NMBA, n (%) | 770 (87.0) | 543 (87.4) | 227 (86.0) | 0.56 |
 Suxamethonium, n (%) | 646 (73.0) | 446 (71.8) | 200 (75.8) | 0.23 |
 Rocuronium, n (%) | 92 (10.4) | 69 (11.1) | 23 (8.7) | 0.29 |
 Other, n (%) | 45 (5.1) | 32 (5.2) | 13 (4.9) | 0.89 |
MACOCHA score, n (%) | Â | Â | Â | 0.37 |
 <3 | 544 (83.9) | 385 (84.8) | 159 (82.0) |  |
 ≥3 | 104 (16.1) | 69 (15.2) | 35 (18.0) |  |
Preoxygenation, n (%) | 841 (95.0) | 585 (94.2) | 256 (97.0) | 0.08 |
Duration of preoxygenation, mean ± SD | 1.23 (0.7) | 1.21 (0.7) | 1.29 (0.7) | 0.11 |
NIV for preoxygenation, n (%) | 371 (41.9) | 233 (37.5) | 138 (52.3) | < 0.0001 |
Incident during ETI, n (%) | Â | Â | Â | Â |
 Inhalation, n (%) | 102 (11.5) | 66 (10.6) | 36 (13.6) | 0.20 |
 Cardiac rhythm abnormalities, n (%) | 15 (1.7) | 8 (1.3) | 7 (2.7) | 0.15 |
 Desaturation, n (%) | 177 (20.0) | 101 (16.3) | 76 (28.8) | < 0.0001 |
Implementation of sedation, n (%) | 802 (90.6) | 554 (89.2) | 248 (93.9) | 0.03 |
FIO2, mean ± SD | 68.52 ± 0.9 | 65.57 ± 1.1 | 75.11 ± 1.5 | < 0.0001 |
Tidal volume, mean ± SD | 458.5 ± 2.9 | 459.01 ± 3.4 | 457.35 ± 5.1 | 0.79 |
PEEP, mean ± SD | 5.76 ± 0.1 | 5.65 ± 0.1 | 6.01 ± 0.1 | 0.02 |
RM, n (%) | 108 (12.2) | 68 (11.0) | 40 (15.2) | 0.08 |