Table 2
Preoperative airway evaluation and assessment of difficult intubation (n=217)

Variable	No. (%)
Preoperative evaluation
Mallampati score≥III	13 (7.0)
Limited range of neck motion (<90°)	57 (26.3)
Limited mouth opening (<3 FB)	21 (9.6)
Shortened thyromental distance (<3 FB)	19 (8.8)
Poor dentition	12 (7.7)
Assessment
Difficult mask ventilation	10 (4.6)
Cormack-Lehane grade IV	22 (10.1)

FB, fingerbreadth ≒ 2 cm.
The number of documented Mallampati score was 187 cases and the number of documented dentition was 156 cases. Poor dentition is defined as having a mobility of front teeth.