METHODS: 152 diabetic patients, 152 hypertensive patients and 152 healthy subjects are planned to be enrolled in this study. The measurements will be done between 9:00 and 13:00. After the measurements, blood and urine samples will be obtained, centrifugated and kept in -80°C until assayed. Afterwards, echocardiographic left ventricle mass index will be calculated. The correlation between albuminuria and arterial stiffness will be assessed as the primary outcome measure.