Figure 2. Correlation between HB1Ac and VGF-expressing CD3+ T cells. The HbA1c (glycated haemoglobin) level provides an integrated average blood glucose measure and was determined during routine blood analysis. The HbA1c value of the cohort increased with age and was positively correlated with frequency of VGF-expressing CD3+ cells within the T cell population (a). Also the body mass index (BMI) increased with a rising number of VGF+CD3+ T cells (b).