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BACKGROUND Universal prevention approaches that target the general population can be effective for promoting children's health. This overview aims to summarize evidence presented in existing reviews of school‐based interventions. METHODS We present an overview of evidence sourced from Campbell and Cochrane systematic reviews. These reviews examined randomized controlled trials concerning school‐based health‐promotion programs for children (mostly aged 4‐18 years) in the general population. RESULTS We identified 56 high‐quality reviews. The reviews focused on emotional and behavioral outcomes, infectious diseases, injury reduction, mental health, nutrition intake, oral health, physical and developmental changes, sense‐organ diseases, sexual‐health outcomes, and substance use/abuse. Positive evidence—such as vision screening plus provision of free spectacles for spectacle wear increase and a combination of social competence and social‐influence approaches for preventing illicit drug use—were considered high certainty. CONCLUSIONS Of the various interventions implemented in school settings that involved people from various occupations, some positive effects were found. In most cases, evidence certainty was negatively affected by a high risk of bias within studies, inconsistencies within the estimates, and insufficient sample sizes. Further primary studies in these areas would be helpful for accumulating evidence to promote stronger cooperation between health and education stakeholders.

Objectives: To examine the lifestyle habits of underweight and overweight junior high school students.Methods: In June 2015, the Fukushima Prefectural Board of Education conducted a diet survey among 1,980 second-graders who attended 16 public junior high schools in the prefecture. We examined the relationship between lifestyle and body size (underweight: ≤-0%, standard: >-10% and <10%, overweight: ≥10%) using lifestyle habits as independent variables and body size as the dependent variable for each gender. Chi-square tests and multinomial logistic regression analysis were used.Results: Of all students, 1,904 replied (response rate: 96.1%). Among underweight boys, the odds of . On the other hand, for girls, the odds of eating snacks frequently were higher for the underweight group, and those of watching TV for a longer duration were higher for the overweight group.Conclusions: Eating slowly or normally and higher frequency of eating snack were related to underweight, and eating fast, lower frequency of eating snack, and less exercise were related to overweight among junior high school boys. Among girls, higher frequency of eating snack was related to underweight, and longer watching TV was related to overweight.Jpn. J. Nutr. Diet., 76 (3) 57～64 (2018)