| Patient Characteristics | N = 268 (%) |
| Gender: Male Female |
159 (59.3%) 109 (40.6%) |
| Obese (BMI ≥ 35) | 128 (47.7%) |
| Short Thyromental Distance (<6 cm) | 84 (31.3%) |
| Restricted Mouth Opening | 19 (7.1%) |
| Reduced Neck mobility | 43 (16%) |
| Bad Dentition | 23 (8.5%) |
| Prev surgery/Radiotherapy | 23 (8.5%) |
| Airway lesion | 13 (4.9%) |
| Blood/secretions | 72 (26.9%) |