Prediction of difficult laryngoscopy / difficult intubation cases using upper airway ultrasound measurements in emergency department: a prospective observational study

Table 4 Statistical characteristics of hyoid bone visibility via ultrasound in predicting difficult laryngoscopy

Characteristic	Results	Higher bound confidence interval	Lower bound confidence interval
Sensitivity	91.15%	95.67	84.33
Specificity	30%	65.25	6.67
Positive likelihood ratio	1.30	1.96	0.86
Negative likelihood ratio	0.29	0.90	0.10
Positive predictive value	93.64%	95.68	90.71
Negative predictive value	23.08%	47.81	8.94

ISSN: 1471-227X