This study aims to estimate the societal costs and potential for cost-effectiveness of 3 nutrition education curricula frequently implemented in United States public schools for childhood obesity prevention.
Kenney EL, Poole MK, McCulloch SM, Barrett JL, Tucker K, Ward ZJ, Gortmaker SL. School-based nutrition education programs alone are not cost effective for preventing childhood obesity: a microsimulation study. Am J Clin Nutr. 2024 Nov 12:S0002-9165(24)00877-3. doi: 10.1016/j.ajcnut.2024.11.006. Epub ahead of print.
Abstract
Background
Although interventions to change nutrition policies, systems, and environments (PSE) for children are generally cost effective for preventing childhood obesity, existing evidence suggests that nutrition education curricula, without accompanying PSE changes, are more commonly implemented.
Objectives
This study aimed to estimate the societal costs and potential for cost-effectiveness of 3 nutrition education curricula frequently implemented in United States public schools for childhood obesity prevention.
Methods
In 2021, we searched for nutrition education curricula in the Supplemental Nutrition Assistance Program (SNAP)-Ed Toolkit, a catalog of interventions for obesity prevention coordinated by the federal government. Standard costing methodologies estimated the societal costs from 2023 to 2032 of nationwide implementation of each identified curriculum. Using the Childhood Obesity Intervention Cost-Effectiveness Study (CHOICES) microsimulation model, which projects the costs, health care costs saved, and cases of obesity prevented for childhood obesity prevention interventions, we conducted threshold analyses for each curriculum, estimating the cost per quality-adjusted life-year for a range of hypothetical effects on child BMI to determine how large of an effect each curriculum would need to have to meet a cost-effectiveness threshold of $150,000 per quality-adjusted life-year.
Results
Three nutrition education curricula without PSE were identified from SNAP-Ed; none had evidence of an impact on obesity risk. From 2023 to 2032, the estimated implementation costs of the curricula nationwide ranged from $1.80 billion (95% upper interval: $1.79, $1.82 billion) to $3.48 billion (95% upper interval: $3.44, $3.51 billion). Each curriculum would have to reduce average child BMI by 0.10 kg/m2 or more—an effect size that has not been reported by any of the 3 curricula, or by more comprehensive existing prevention programs—to be considered cost effective at this threshold.
Conclusions
SNAP-Ed–endorsed nutrition education curricula alone are unlikely to be cost effective for preventing childhood obesity. Continued efforts to implement interventions with strong evidence for effectiveness, including PSE approaches, are needed.
Keywords
childhood obesity; nutrition educationl schools; prevention; cost-effectiveness analysis; threshold analysis
Funding
This study was supported by Healthy Eating Research, a national program of the Robert Wood Johnson Foundation (2833590), The JPB
Foundation, the National Heart, Lung, and Blood Institute (NHLBI) (5T32HL098048, R01HL146625, and 1F31HL162250), the National
Institute of Diabetes and Digestive and Kidney Diseases (K01DK125278), and the Centers for Disease Control and Prevention (U48DP006376). The content is solely the responsibility of the authors and does not necessarily represent the official views of these agencies.