Inclusion Criteria:

• patients with controlled type 2 diabetes mellitus with overt CVD
• patients with controlled type 2 diabetes mellitus over the age of 40 years without overt CVD,but with one or more major cardiovascular risk factors

Exclusion Criteria:

• uncontrolled hypertension (systolic blood pressure >180 mm Hg or diastolic blood pressure >95 mm Hg); evidence of active active liver disease or hepatic dysfunction defined as a level of liver transaminases >2 times the upper limit of normal; uncontrolled myocardial ischaemia; congestive heart failure (New York Heart Association classification IIIb or IV); hemodynamically important valvular disease; secondary hypercholesterolemia; gastrointestinal disease that might limit drug absorption or partial ileal bypass; myopathy, or rhabdomyolysis; a known hypersensitivity to statins; using any androgenic, estrogenic, progestogenic, antiandrogenic, or antiestrogenic agents or medications that can alter the gonadal steroid milieu; using systemic immunosuppressants or anticoagulants; plasma creatine kinase levels >50% above the upper limit of normal,transient ischaemic attack or stroke in past,severe hypertriglyceridaemia (fasting triglyceride level ≥350 mg/dl,Currently on psychotropic medications, steroids, opiate analgesics, Known case of major neuropsychiatric illness,Poor cognition at baseline [Mini-Mental State Examination(MMSE) score ≤24],Physically or mentally unable to complete tests, history of other risk factors for hearing loss and/or conventional assessment that presented conductive hearing loss, confirmed by acoustic immittance measurement;presence of non-auditory associated disorders that could lead to long-latency potentials, such as neurological diseases or syndromes