Background: This study was motivated by the high incidence of diarrhea among school-aged children, which is often associated with unhealthy snack consumption behavior and poor hygiene practices. Objective: Investigating the relationship between snacking behaviors and the occurrence and non-occurrence of diarrhea among students at SD Negeri Ponjong 3 in Gunungkidul. Methods: This study used a quantitative design with 70 students as respondents, using total sampling. Data were collected through a questionnaire on snack consumption behavior and diarrhea incidence, then analyzed using the Spearman Rank test. Results: The results of the study showed that the majority of students had unhealthy snacking behaviors (52.9%), and more than half of the respondents (57.1%) had experienced diarrhea in the past three months. The Spearman Rank test yielded a p-value of 0.000, indicating a highly significant relationship, and a correlation coefficient (r) of 0.512, which suggests a moderate correlation between snacking behavior and the incidence of diarrhea among students at SD Negeri Ponjong 3 Gunungkidul. Conclusion: Unhealthy snacking habits are associated with the incidence of diarrhea among school-age children. It is recommended that schools and parents enhance nutrition and hygiene education, provide hand-washing facilities with soap, and encourage the habit of bringing meals from home.
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