Table 5. Correlation between epiglottis obstruction and other structural obstruction in DISE
| Variable | Level | Epiglottic obstruction (n (%)) | χ2-value | p-value |
| 0 (n=166) | 1 (n=35) | 2 (n=70) |
| Palate AP | 0 | 14 (53.8) | 5 (19.2) | 7 (26.9) | 12.56 | .014 |
| 1 | 21 (95.5) | 0 ( 0.0) | 1 ( 4.5) |
| 2 | 131 (58.7) | 30 (13.5) | 62 (27.8) |
| Palate Lat | 0 | 28 (56.0) | 7 (14.0) | 15 (30.0) | 1.363 | .851 |
| 1 | 30 (58.8) | 8 (15.7) | 13 (25.5) |
| 2 | 108 (63.5) | 20 (11.8) | 42 (24.7) |
| Tonsil | 0 | 108 (70.6) | 12 ( 7.8) | 33 (21.6) | 24.78 | <.001 |
| 1 | 15 (31.9) | 13 (27.7) | 19 (40.4) |
| 2 | 43 (60.6) | 10 (14.1) | 18 (25.4) |
| TB AP | 0 | 63 (84.0) | 2 ( 2.7) | 10 (13.3) | 34.41 | <.001 |
| 1 | 59 (62.1) | 17 (17.9) | 19 (20.0) |
| 2 | 44 (43.6) | 16 (15.8) | 41 (40.6) |
| TB Lat | 0 | 49 (62.0) | 9 (11.4) | 21 (26.6) | 5.470 | .242 |
| 1 | 69 (68.3) | 10 ( 9.9) | 22 (21.8) |
| 2 | 48 (52.7) | 16 (17.6) | 27 (29.7) |
Data are presented as n (%).
DISE: drug-induced sleep endoscopy, AP: anteroposterior, Lat: lateral, TB: tongue base.