<![CDATA[Diarrhea remains one of the most common health problems in Islamic boarding schools due to overcrowded living conditions and suboptimal clean and healthy living behaviors. One of the factors that may influence the incidence of diarrhea is personal hygiene. Preliminary observations conducted at Islamic boarding schools in Widodaren District, Ngawi Regency, indicated that personal hygiene practices were still inadequate. This study aimed to analyze the relationship between personal hygiene and the incidence of diarrhea in Islamic boarding schools in Widodaren District, Ngawi Regency. This study employed a quantitative analytic design with a cross-sectional approach. The study sample consisted of 171 students aged 10–19 years from Al-Futuhiyah Islamic Boarding School and Syarifatul 'Ulum Islamic Boarding School. Data were collected using questionnaires and were analyzed using the Chi-square test. The results showed that most respondents demonstrated a moderate level of personal hygiene (37.4%). The bivariate analysis revealed a significant relationship between personal hygiene and the incidence of diarrhea (p-value = 0.000; p < 0.05). The highest proportion of diarrhea cases was found among respondents with poor personal hygiene, accounting for 54 respondents (96.4%). The study concludes that poor personal hygiene may be one of the risk factors for diarrhea among students at Islamic boarding schools. Therefore, improvements in clean and healthy living behaviors are needed within the Islamic boarding school environment.]]>
