Association of patient and procedural characteristics with airway risk features
| Variables | Total, n (%) | Tracheal AP diameter | Tracheal position | |||||||
| >50%, n (%) | ≤50%, n (%) | Χ2 | P value | Deviated, n (%) | Not deviated, n (%) | Χ2 | P value | |||
| Patient characteristics | ||||||||||
| Diagnosis | Lymphoma | 15 (60) | 11 (85)* | 4 (33)* | 9.241 | 0.026 | 6 (60) | 9 (60) | 3.542 | 0.315 |
| Neuroblastoma | 4 (16) | 2 (15) | 2 (17) | 3 (30) | 1 (73) | |||||
| Others | 5 (24) | 0 (0)* | 6 (50)* | 1 (10) | 5 (33) | |||||
| Procedural characteristics | ||||||||||
| Type of anesthesia | General anesthesia | 13 (52) | 4 (31) | 9 (75) | 4.891 | 0.047† | 5 (50) | 8 (53) | 0.027 | 1.000† |
| Sedation | 12 (48) | 9 (69) | 3 (25) | 5 (50) | 7 (47) | |||||
| Airway device | ETT | 6 (24) | 1 (8) | 5 (42) | 5.779 | 0.056 | 3 (30) | 3 (20) | 0.496 | 0.780 |
| LMA | 7 (28) | 3 (23%) | 4 (33) | 3 (30) | 4 (27) | |||||
| None | 12 (48) | 9 (69) | 3 (25) | 4 (40) | 8 (53) | |||||
| Position | Upright | 6 (24) | 6 (46) | 0 (0) | 7.287 | 0.015† | 0 (0) | 6 (40) | 5.263 | 0.051† |
| Horizontal | 19 (76) | 7 (54) | 12 (100) | 10 (100) | 9 (60) | |||||
| Biopsy technique | Percutaneous | 16 (64) | 8 (61) | 8 (67) | 0.103 | 0.950 | 7 (70) | 9 (60) | 0.558 | 0.757 |
| Open | 7 (28) | 4 (31) | 3 (25) | 2 (20) | 5 (33) | |||||
| Thoracoscopic | 2 (8) | 1 (8) | 1 (8) | 1 (10) | 1 (7) | |||||
*Subset pairs with significant difference in column proportions at 5% level of significance, post-hoc pairwise z-test.
†Fisher’s exact test.
AP, anteroposterior; ETT, endotracheal tube; LMA, laryngeal mask airway.