Evaluation of computed tomography in the diagnosis of ultrasound-proven diaphragm dysfunction

Respiratory Research

Table 3 ROC curve analyses

Group	Measurement	Side	AUC	95%CI	Threshold	Accuracy	Se (%)	Spe (%)	PPV (%)	NPV (%)
Paralysis	L1 (mm)	R	0.93	84–100	4.5	0.87	87	87	95	70
	Celiac (mm)	R	0.84	70–98	3.0	0.75	71	87	94	50
	L1 (mm)	L	0.99	95–100	3.8	0.93	92	94	96	89
	Celiac (mm)	L	0.97	93–100	2.6	0.95	100	88	92	100
Weakness	L1 (mm)	R	0.67	43–92	9.4	0.81	57	87	57	87
	Celiac (mm)	R	0.73	49–96	4.9	0.84	71	84	62	91
	L1 (mm)	L	0.88	75–100	5.0	0.77	71	100	100	46
	Celiac (mm)	L	0.93	85–100	2.6	0.87	87	86	95	67
Paralysis	Height difference (cm)	R	1.00	100–100	4.4	1.00	100	100	100	100
Paralysis	Height difference (cm)	L	0.98	94–100	2.7	0.95	88	100	100	93
Weakness	Height difference (cm)	R	1.00	100–100	3.5	1.00	100	100	100	100
Weakness	Height difference (cm)	L	0.79	56–100	2.5	0.88	71	93	71	93

R Right, L Left, AUC area under the curve, 95%CI 95% confident interval, Se sensitivity, Spe specificity, PPV positive predictive value, NPV negative predictive value
Threshold values of CT-scan measurements to diagnose diaphragm dysfunction (ultrasound as reference) at the level of the celiac artery or L1 (mm) and of the height difference (cm)

ISSN: 1465-993X