TABLE III. Receiver operating characteristic (ROC) optimum point of cross-sectional areas (CSAs), differential CSA index (∆CSAs) and differential tunnel (T)-pre-tunnel (PT) index (∆TPT) in healthy volunteers (HVs) and leprosy patients (LPs), respective sensitivity and specificity and analysis of area under the ROC curve.

Nerves	Variable	HVs (n)	LPs (n)	ROC optimum point (mm2)	Sensitivity (%)	Specificity (%)	Area under the ROC curve
							Area	SE	p
Ulnar (PT)	CSAs	92	142	6.85	68	85	0.79	0.03	< 0.0001
Ulnar (T)		92	148	7.35	71	78	0.80	0.03	< 0.0001
Median		96	128	6.75	62	75	0.73	0.03	< 0.0001
Common fibular		96	130	9.55	81	72	0.80	0.03	<0.0001
Ulnar (PT)	∆CSAs	46	71	1.35	49	80	0.66	0.05	0.003
Ulnar (T)		46	74	1.55	55	85	0.69	0.05	0.0006
Median		48	64	0.70	58	50	0.52	0.06	0.73
Common fibular		48	65	1.25	54	67	0.63	0.05	0.022
Ulnar (T and PT)	∆TPT	98	146	2.65	41	90	0.66	0.04	< 0.0001

SE: standard error.