Objective To investigate the difference of procalcitonin (PCT) level between uninfected diabetic nephropathy patients and healthy volunteers. Methods This study enrolled 76 patients with diabetes only 〔DM group, 24 h urinary micro albumin (mALB)PP r=0.541, P r=0.320, P r=0.324, P r=0.403, P r=0.791, P r=0.694, P