Table 5 Correlation between modified Mallampati score (MMS) and (awake nasoendoscopy, multi-view videofluoroscopy, and DISE) regarding grade of collapse

Awake nasoendoscopy

 Retropalatal level

0.33

0.054

 Retroglossal level

0.67

0.019*

 Hypopharyngeal level

0.29

0.13

Videofluoroscopy

 Retropalatal level

0.38

0.047*

 Retroglossal level

0.57

0.023*

 Hypopharyngeal level

0.37

0.093

DISE

 Retropalatal level

0.16

0.46

 Retroglossal level

0.64

0.041*

 Hypopharyngeal level

0.634

0.001*