Methods: Analyze and compare prevalence of stunting, wasting, overweight and obesity, and means of height and BMI of school students from epidemilology surveys in HCMC in 2002 (1412 primary school children and 1454 junior-high school students), in 2004 (1425 high school students), and in 2009 (776 primary school children, 1650 junior - high school students, and 1404 high school students).