Table 3.

Diagnostic accuracy of extended, 12-zone lung ultrasound protocol

Lung pattern	LU/CT	CT +	CT -	Sensitivity (95% CI)	Specificity (95% CI)	LR + (95% CI)	LR—(95% CI)
Consolidation	LU +	37	10	0.80 (0.66 to 0.91)	0.62 (0.41 to 0.80)	2.1 (1.3 to 3.5)	0.32 (0.16 to 0.62)
	LU-	9	16
Interstitial syndrome	LU +	14	5	0.64 (0.41 to 0.83)	0.64 (0.35 to 0.87)	1.8 (0.8 to 3.9)	0.57 (0.29 to 1.1)
	LU-	8	9
Pneumothorax	LU +	3	1	0.50 (0.12 to 0.88)	0.97 (0.83 to 1.0)	15.0 (1.9 to 120.9)	0.5 (0.2 to 1.1)
	LU-	3	29
Pleural effusion	LU +	26	2	0.81 (0.64 to 0.93)	0.50 (0.07 to 0.93)	1.6 (0.6 to 4.4)	0.38 (0.11 to 1.27)
	LU-	6	2

Table depicting secondary outcome, i.e., the diagnostic accuracy of a 12-zone lung ultrasound protocol. Two-by-two contingency Tables are displayed for consolidation, interstitial syndrome, pneumothorax and pleural effusion. A positive outcome for each outcome is denoted by a ‘ + ’, whereas a negative outcome is denoted by a ‘- ‘. Diagnostic accuracy parameters are estimated with their respective 95% confidence interval. BLUE: bedside lung ultrasound in emergency; LU: lung ultrasound; CT: computed tomography; CI: confidence interval; LR + : positive likelihood ratio; LR -: negative likelihood ratio