Changes in the prevalence of undernutrition, overweight and obesity in children and adolescents from Buenos Aires, Mendoza, and Misiones provinces (Argentina) over the last two decades.

This 14-year follow-up study shows a decreasing trend in the prevalence of undernutrition and an increasing trend in the prevalence of overweight, obesity, and fat mass in the child and adolescent population of Argentina. Also, a marked deterioration in family socioeconomic conditions was found, but its relationship with the changes in nutritional status remains to be elucidated.