<![CDATA[Introduction: The increasing use of smartphones among adolescents has raised concerns about the physical and mental impact of nomophobia. However, research on how levels of nomophobia affect sleep quality, social interactions, and cognitive function is limited. This study aims to examine the differential relationship between nomophobia and sleep disturbances, social interactions, and cognitive function in adolescents. Method: A cross-sectional study was used for this study. Simple random sampling was used with 387 adolescents in Sidoarjo City, Indonesia. Nomophobia and other variables were measured using a questionnaire. Descriptive statistics, chi-square tests, and ordinal logistic regression are used to analyzed to assess the relationships between variables. Results: Using severe nomophobia as the reference category, adolescents with no, mild, and moderate nomophobia had significantly lower odds of experiencing more severe sleep disturbances and cognitive impairment (p<0.05). For social interaction, mild and moderate nomophobia were significantly associated with lower odds of impaired social interaction compared with severe nomophobia (p<0.05), whereas the difference between no nomophobia and severe nomophobia was not statistically significant (p=0.081). The ordinal logistic regression model was statistically significant and met the proportional odds assumption. Conclusions: There are differences in the relationship between nomophobia and sleep disturbances, social interactions, and cognitive function. The relationship between nomophobia and social interactions is more complex than that between sleep disturbances and social interactions. The results of this study emphasize the need to understand the impact of nomophobia on adolescents across multiple dimensions.]]>
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