Table 1

 Summary of results

CharacteristicEasy intubation groupNumberDifficult intubation groupNumberp Value
*Significance accepted at the level of 0.05 = 5%; NS, non-significant. †Fisher’s exact test (two tailed); ‡Student’s t test (two tailed).
Number of patients11442
Sex ratio (M/F)75/3911432/10420.25 NS†
Male percentage65.876.2
Mean (SD)Mean (SD)
Age53.8 (23.2)11455.7 (18.7)420.86 NS‡
Look %%
Facial trauma11.310612.2411.0 NS†
Large incisors6.510828.642<0.001 *†
Beard or moustache6.31119.8410.49 NS†
Large tongue1.01042.4410.49 NS†
Evaluate %%
Incisor distance 3+61.87631.029<0.05 *†
Incisor distance <338.269.0
Hyoid / mental dist 3+65.87654.2240.34 NS†
Hyoid / mental dist <334.245.8
Thyroid to mouth 2+86.68258.324<0.05*†
Thyroid to mouth <213.441.2
Mallampatti %%
Grade 1 or 267.26778.9190.41 NS†
Grade 3 or 432.821.1
Obstruction %%
Obstructed airway6.510814.3420.19 NS†
Neck mobility %%
In collar/limited16.210528.6420.11 NS†
Full and free83.871.41