title: A preliminary investigation of EZSCAN™ screening for impaired glucose tolerance and diabetes in a patient population.
abstract: EZSCAN™ is a non-invasive technology that evaluates sweat gland dysfunction using electrochemical skin conductance measurements, providing an opportunity to determine the risk of impaired glucose tolerance (IGT) and diabetes mellitus (DM). This study was conducted with the aims of detecting IGT and DM and investigating the efficacy and cut-off points of the EZSCAN test in a patient population. The traditional serum and plasma glucose tests were used as comparators. In this cross-sectional study, 270 previously undiagnosed patients (180 women and 90 men) with a high risk of glucose metabolism disorders (≥45 years old) were enrolled. All patients underwent an oral glucose tolerance test (OGTT) and hemoglobin A1c (HbA1c), fasting plasma glucose (FPG) and EZSCAN tests. Forty (14.8%) patients had newly diagnosed DM (NDM), 79 (29.3%) had IGT and 151 (55.9%) had normal glucose tolerance. The EZSCAN values of these groups were 48±11, 47±11 and 34±13%, respectively. For all patients, the correlation coefficient of EZSCAN was 0.462 with the OGTT (P<0.001), 0.182 with the FPG test (P<0.001) and 0.379 with the HbA1c test (P<0.001). The EZSCAN cut-off point for the detection of IGT was 37% [sensitivity, 82%; specificity, 62%; area under the curve (AUC), 0.778], and the cut-off point for NDM was 50% (sensitivity, 53%; specificity, 59%; AUC, 0.528). This study demonstrated that the non-invasive EZSCAN system is an effective screening tool for the detection of glucose dysfunction in the population tested, and that its performance in detecting previously undiagnosed IGT is superior to its performance in detecting DM.
authors.affiliation: Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, Sichuan 400016, P.R. China.
authors.forename: Xiaolu
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Cardiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China.
authors.forename: Lizhu
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Cardiology, Peking University People's Hospital, Beijing 100044, P.R. China.
authors.forename: Rongjing
authors.initials: R
authors.lastname: Ding
authors.affiliation: Department of Internal Medicine, Xianghe Community Hospital, Xianghe, Hebei 065400, P.R. China.
authors.forename: Qiuting
authors.initials: Q
authors.lastname: Shi
authors.affiliation: Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, Sichuan 400016, P.R. China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Cardiology, First Affiliated Hospital of Chongqing Medical University, Chongqing, Sichuan 400016, P.R. China.
authors.forename: Dayi
authors.initials: D
authors.lastname: Hu
keywords: Chinese; EZSCAN™; diabetes; impaired glucose tolerance