Table 2. Impact of studied factors on difficult intubation.

Values are odds ratio (OR), 95% confidence intervals (95% CI).

	OR	95% CI	p
Increase in thyromental height test	0.93	0.88–0.98	0.007
Increase in Cormack & Lehane classification	2.97	1.69–5.24	0.0001
Decrease in thyromental distance	1.46	0.95–2.26	0.086
Decrease in sternomental distance	0.88	0.68–1.13	0.31
Increase in Mallampati scale	1.3	0.77–2.18	0.32