Patients’ demographic data and MRI indicators
| Indicators | Easy laryngoscopy group (n=261) | Difficult laryngoscopy group (n=54) | P value |
| Age (years) | 52.8±10.5 | 56.2±8.6 | 0.03 |
| Sex (male/female) | 152 (58%)/109 (42%) | 48 (89%)/6 (11%) | <0.01 |
| Height (cm) | 166.0±8.1 | 167.7±6.8 | 0.16 |
| Weight (kg) | 69.0±11.8 | 73.1±9.6 | 0.02 |
| DSH (cm) | 1.73±0.54 | 1.61±0.52 | 0.18 |
| DSE (cm) | 3.76±0.53 | 3.79±0.53 | 0.72 |
| DST (cm) | 0.66±0.24 | 0.59±0.23 | 0.10 |
| DSV (cm) | 1.49±0.41 | 1.43±0.42 | 0.44 |
| DSS (cm) | 4.53±0.72 | 4.52±0.75 | 0.92 |
Values are presented as mean±SD or number (proportion).
DSE, distance from skin to epiglottis; DSH, distance from skin to hyoid bone; DSS, distance from skin to anterior to the trachea at the level of the suprasternal notch; DST, distance from skin to thyroid cartilage at the level of the vocal cords; DSV, distance from skin to vocal cords