Table 2.

Airway parameters and risk factors, ^∗P value < 0.05.

Variable	Frequency n  {%}
Oropharyngeal view (OPV)
OPV I & II	150 {70.8%}
OPV III & IV	31 {14.6%}∗
Jaw slide grade (JSD)
JSD A	73 {34.4%}
JSD B	91 {42.9%}
JSD C	17 {8%}∗
Mouth opening (interincisor length)
<30 mm	18 {8.9%}
31–50 mm	149 {70.3%}
>51 mm	13 {6.1%}∗
Mandibular length (MBL)
<70 mm	4 {1.9%}
71–85 mm	30 {14.2%}
86–95 mm	80 {37.7%}
>96  mm	67 {31.6}
Sternomental distance (SMD)
81 mm–120 mm	65 {30.7%}
121 mm–135 mm	76 {35.6%}
>136 mm	40 {18.9}
Thyromental distance (TMD)
<50 mm	2 {0.9%}
51–65 mm	67 {31.6%}
66–75 mm	67 {31.6%}
>76 mm	45 {21.2%}