ArticleObesity facts2026
Design, Methods, and Pilot Baseline Results of the SEÍSMO Study: A School-Based Cluster Randomized Controlled Trial to Prevent Pediatric Obesity among Disadvantaged Communities in Spain.
Article in Obesity facts, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionPediatric obesity is a major health issue with a growing worldwide trend since 1990. The present study aims to describe the design, methods, and pilot baseline results of a school-based obesity-prevention intervention implemented in disadvantaged communities.
methodsThe SEÍSMO study integrates two stages: the first stage includes baseline and follow-up assessments for 11,139 children aged 6-12, evaluated at baseline between 2020 and 2024 in 120 Spanish schools. The second stage is a 6-year cluster randomized controlled trial (RCT) that incorporated the learnings of the first stage to assess from 2024 to 2041 two primary outcomes (z-score body mass index and waist-to-height ratio) and several secondary outcomes (healthy lifestyles, quality of life, academic performance, psychosocial determinants, psychological resilience, and weight stigma) will be evaluated at 12, 24, 36, and 48 months. A sample size of 56 clusters and 4,760 participants is needed, assuming an attrition rate of 35% by 36 months post-baseline, but an oversampling will result in 10,080 participants. In this stage will involve three recruitment editions (2024-2025, 2025-2026, 2026-2027) and will incorporate children aged 3-12 located in Catalonia, Spain. The intervention includes a total of 50 specific action groups. In both study stages, a follow-up will be conducted at 18 years of age, involving a total of 21,219 children.
conclusionsSEÍSMO first-stage participants present prevalences of severe obesity and abdominal obesity of 5.4% and 31.3%, respectively. There is an urgent need to have effective obesity-prevention with the capacity to reduce the current inequalities.
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