Figure 2

Scatter plots with regression line for the relation of the electrochemical conductance at the hands (circles), feet (triangles) and forehead (squares) locations with 2-hour post-load plasma glucose concentration (left panel) and serum glycosylated haemoglobin (HbA1c, right panel) in patients who had an oral glucose tolerance test (n = 80). The dashed vertical line denotes the threshold for the diagnosis of diabetes mellitus. Open and closed symbols represent diabetic patients and non-diabetic subjects, respectively. Correlation coefficients and P values are given for the feet, hands and forehead locations separately.