After teaching basic concepts about prevention of diabetic nephropathy in all subjects, investigators will collect demographics data, house conditions and localization (rural, urban or around the cities), number of people that share a home, education level, employment and economical condition, personal health insurance, medical checkup history, toxic habits (alcohol, cigarette abuse of addictive substances) and physical exercises habits. Investigators will collect personal and family antecedent of diabetes mellitus, diabetic nephropathy, hypertension, kidney diseases, diabetes gestational, current treatments and other chronic diseases. Investigators will measure body weight (Kg), height (m) and investigators will calculate body mass index. Investigators will also measure blood pressure, blood glucose, glycosylated hemoglobin, microalbuminuria and proteinuria. Trained personnel will fill out the person's survey. Investigators will supervise and collect data from 2% of the sample.