Methods The investigation was conducted by means of case control study,including 128 patients of type 2 diabetes with asymptomatic bacteriuria(ASB +),300 type 2 diabetes without ASB(ASB -),74 nondiabetic controls.

• 方法 采用病例对照研究 ,2型糖尿病伴无症状菌尿 (ASB+ )组 12 8例 ,2型糖尿病不伴ASB(ASB-)组 30 0例 ,正常对照组 74例。