Snack Expenditure and Nutritional Status in Chilean Schoolchildren: A Cross-Sectional Study in a Southern Region

Background and Objective: The availability of money to purchase food within the school setting has been identified as a factor associated with children’s nutritional status. The aim of this study was to analyze the relationship between spending on snacks and the nutritional status of Chilean schoolchildren living in a region in the far south. Methods: This was a descriptive, correlational, cross-sectional study. A total of 596 schoolchildren and adolescents (12.1 ± 1.3 years) from three public schools in the Magallanes Region, Chile, participated. Nutritional status was assessed using body mass index (BMI) for age, and a validated questionnaire was applied to assess frequency and type of food purchases within the school environment. To determine associations, ANOVA and Chi-square tests were used, with statistical significance set at p < 0.05. Results: Among boys, 25.8% were overweight, 36.4% with obesity, and 8.6% severely with obesity; among girls, 34.9% were overweight, 30.5% with obesity, and 5.5% severely with obesity. The average snack expenditure was 642.7 ± 658 CLP (Approximately USD 0.67). Weekly purchase frequency was once in 29.5% and twice in 26.9% of cases (p < 0.001), with no differences across BMI categories (ANOVA p = 0.469). Food preferences were unhealthy snacks in 46.5% and healthy snacks in 24.0% of cases, with no association with nutritional status (χ2 = 6.073; df = 10; p = 0.728). Conclusion: Although no direct association was found between snack spending and nutritional status, high consumption of unhealthy foods reflects a persistent risk. The results highlight the importance of strengthening public and educational policies regarding school meals. A comprehensive approach is needed that combines regulation, nutrition education, and family involvement. This study provides novel evidence for the design of interventions in southern and isolated regions.