The role of worry and rumination in eating disorders (EDs) is controversial. This meta-analysis of the literature is aimed at clarifying the relationship between repetitive negative thinking (RNT) and EDs. In accordance with the PRISMA criteria, a comprehensive search of the literature was conducted on PubMed and PsycInfo from inception to March 2021. Search terms: “eating disorder/anorexia/bulimia/binge eating disorder” AND “worry/rumination/brooding/repetitive thinking”. A manual search of reference lists was also run. Forty-three studies were included. RNT was found to be associated with anorexia, bulimia, and binge eating disorder. A moderating effect was found for “presence/absence ED diagnosis” and “subtype of ED symptom”. ED patients showed higher RNT than the general population. No differences were observed for age or between worry and rumination in the magnitude of their association with EDs.

The efficacy of the Cool Kids program has been consistently demonstrated both within Australia and internationally, but limited data are available on the use of Cool Kids as a universal program. The purpose of the study is to evaluate Cool Kids as a universal program for preventing childhood anxiety in the school context. There were 73 Italian children (35 boys and 36 girls, ages 10–13 years) attending the last year of primary school and the first year of middle school who participated in an active intervention based on a school adaptation of the Cool Kids protocol. Results of t-test analyses highlighted a downward trend of anxiety symptoms, especially in total anxiety, somatic anxiety, generalized anxiety, separation anxiety, social anxiety and school phobia at post-treatment assessed by children. Even the score of depression symptoms, measured as a second outcome measure, decreased after the treatment. This study contributes to the evidence base for the Cool Kids program as a universal program for preventing childhood anxiety in the school context. Although these preliminary results show some promise, their replication in future research is necessary given current study limitations.