Overweight, Obesity, and Growth Faltering Among Low-Income Children in Brazil

Area of Science:

• Child Health and Nutrition
• Public Health Policy
• Epidemiology

Background:

• Child nutritional status is critical for health outcomes.
• Undernutrition and stunting remain prevalent, while overweight and obesity are increasing public health concerns.
• Accurate quantification of these conditions across subpopulations is vital for targeted interventions.

Purpose of the Study:

• To compare height-for-age and BMI-for-age adequacy in low-income Brazilian children.
• To determine the prevalence of overweight, obesity, and stunting.
• To analyze these prevalences by region, age, sex, and ethnoracial group.

Main Methods:

• A large cohort study utilizing administrative health records of over 6.4 million Brazilian children (0-10 years).
• Data from the Unified Registry, Live Birth Information System, and Food and Nutrition Surveillance System were analyzed.
• Anthropometric adequacy was assessed using WHO standards for height-for-age and BMI-for-age z-scores.

Main Results:

• The study analyzed 6,494,753 children, with 6.68% experiencing stunting, 12.61% overweight, and 7.54% obesity.
• Obesity prevalence increased with age, from 8.48% at 5 years to 10.09% at 9 years.
• Significant regional and ethnoracial disparities were observed in stunting and obesity rates, with higher obesity in boys and varying prevalence among girls by ethnoracial group.

Conclusions:

• Persistent regional and ethnoracial disparities in both undernutrition (stunting) and overnutrition (obesity) were identified.
• The simultaneous presence of undernutrition and obesity highlights the need for urgent, tailored nutrition and health policies.
• These findings emphasize the importance of addressing socioeconomic and demographic factors in child health interventions.