Table 2.

Diagnostic Test Accuracy Results

Index test	Sensitivity	Specificity	LR+	LR–	AUC
DSE	0.82 (0.74–0.87)	0.79 (0.70–0.87)	3.91 (2.65–5.76)	0.23 (0.16–0.33)	0.87 (0.84–0.90)
DSHB	0.71 (0.58–0.82)	0.71 (0.57–0.82)	2.46 (1.50–4.04)	0.40 (0.25–0.66)	0.77 (0.73–0.81)
DSVC	0.75 (0.62–0.84)	0.72 (0.45–0.89)	2.63 (1.16–5.98)	0.36 (0.20–0.62)	0.78 (0.74–0.81)
Pre-E/E-VC	0.65 (0.22–0.93)	0.68 (0.43–0.85)	2.02 (1.0–4.07)	0.51 (0.63–6.11)	0.71 (0.67–0.75)

Data reported as estimate value (95% CI).

Abbreviations: AUC, area under the curve; CI, confidence interval; DSE, distance from skin to epiglottis; DSHB, distance from skin to hyoid bone; DSVC, distance from skin to vocal cords; E-VC, distance from the epiglottis to the midpoint of the distance between the vocal cords; LR+, positive likelihood ratio; LR–, negative likelihood ratio; Pre-E, pre-epiglottis space.