However, when split into the type 1 diabetes (n = 30) and non-diabetes control (n = 30) groups, the relationships were no longer significant, except for HbA1c and CD34+CD45dimVEGFR2+CXCR7+ EPCs (r = − 0.364, p = 0.048) in the type 1 diabetes group. Here, CD34 is linked to diabetes mellitus.