Table 2. Diagnostic performance of the feet ESC, VPT, and DNS in detecting DPN.

	Cutoff	Sensitivity	Specificity	PPV	NPV	AUC
DNS	≥ 1	52%	60%	25%	83%	0.60
VPT	> 15 V	72%	90%	66%	92%	0.84
Feet ESC	< 60 μS	85%	85%	61%	95%	0.88

DNS–diabetic neuropathy symptom score, VPT–vibration perception threshold, Feet ESC–feet electrochemical skin conductance, PPV–positive predictive value, NPV–negative predictive value, AUC–area under curve