Objective To observe the levels of plasma and urinary urotensin Ⅱ in patients with Type 2 diabetes mellitus (DM)and to investigate the influence of renal impairment and other involved clinical or laboratory feature on them. Methods The 42 patients with type2 patients were divided into three groups according to their correctional clearance of creatinine(Ccr):Group A(n=14)with Ccr≥70 mL/min; group B(n=18)with 30≤Ccr