Ain-Shams Journal of Anesthesiology

Table 1 Airway characteristics according to laryngoscopic view and intubation conditions

From: Sternomental displacement and neck circumference: a new look for the neck as a difficult airway predictor in obese surgical patients—a cohort study

Airway measure	Laryngoscopic view			Intubation conditions
Airway measure	Easy n = 107	Difficult n = 28	P value	Easy n = 125	Difficult n = 10	P value
Age (years)	39.1 ± 9.3	36.9 ± 6.5	0.2	38.6 ± 9.1	39.4 ± 3.6	0.3
BMI (kg/m²)	40.8 ± 3.4	42.2 ± 2.3	0.3	40.8 ± 3.2	43.1 ± 2.4	0.03
MMT (class)	2 (1–3)	3 (2–4)	0.001	2 (1–4)	3 (2–4)	0.02
SMDD (cm)	5.7 ± 0.4	4.4 ± 0.5	0.001	5.5 ± 0.6	4.4 ± 0.5	0.001
NC (cm)	41.2 ± 2.2	45.1 ± 3.2	0.001	41.8 ± 2.7	45 ± 4	0.001
NC/SMDD ratio	7.2 ± 0.3	10.3 ± 1.5	0.001	7.7 ± 1.4	10.5 ± 1.8	0.001

Data are expressed as mean ± SD, or median (range). Abbreviations: BMI body mass index, MMT modified Mallampati test, SMDD sternomental displacement, NC neck circumference. P-value < 0.05 is statistically significant

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