Table 2. Univariate logistic regression analysis of airway assessment variables and DMV.
| Variables | OR | 95% CI | P value |
|---|---|---|---|
| Age (years) | 1.043 | 1.032–1.055 | <0.001 |
| Gender | |||
| Female | Reference | ||
| Male | 4.541 | 3.320–6.266 | <0.001 |
| BMI (kg/m2) | 1.290 | 1.230–1.355 | <0.001 |
| Snoring history | 3.550 | 2.612–4.854 | <0.001 |
| Neck radiotherapy | 7.783 | 2.329–29.941 | 0.001 |
| Beard | 2.174 | 0.101–22.792 | 0.527 |
| No teeth | 4.338 | 0.518–36.319 | 0.143 |
| IIG (cm) | 0.966 | 0.832–1.124 | 0.655 |
| TMD (cm) | 0.961 | 0.877–1.053 | 0.400 |
| NC (cm) | 1.295 | 1.241–1.353 | <0.001 |
| MMT | |||
| 1 | Reference | ||
| 2 | 1.405 | 0.907–2.179 | 0.127 |
| 3 | 1.869 | 1.273–2.772 | 0.002 |
| 4 | 2.647 | 1.595–4.367 | <0.001 |
| Mandibular protrusion | |||
| 1 | Reference | ||
| 2 | 2.075 | 1.244–3.377 | 0.004 |
| 3 | 1.641 | 0.585–4.009 | 0.304 |
| Cervical spine mobility | |||
| 1 | Reference | ||
| 2 | 6.066 | 2.534–15.045 | <0.001 |
| 3 | 4.550 | 0.179–115.369 | 0.285 |
DMV, difficult mask ventilation; OR, odds ratio; CI, confidence interval. BMI, body mass index; MMT, modified Mallampati test; NC, neck circumference; IIG; inter-incisor gap; TMD, thyromental distance.