Relation of Smartphone Addiction, Sleep Quality, and Sustained Attention in Young Adults

Background Excessive smartphone use has become increasingly common among young adults and may negatively influence both sleep patterns and attentional abilities. Objectives The present study aimed to explore the relationship between smartphone addiction, sleep quality, and sustained attention in young adults. Methods A correlational study was carried out among individuals aged 18–25 years residing in Ahmedabad. Participants first completed the Smartphone Addiction Scale–Short Version (SAS-SV). Those scoring above the cutoff were further assessed using the Pittsburgh Sleep Quality Index (PSQI) and the Digit Symbol Substitution Test (DSST). Statistical analysis was performed using SPSS version 20.0, applying Spearman’s rho correlation test. Results Findings revealed a significant positive association between smartphone addiction and poor sleep quality (r = 0.576, p < 0.001). Sleep quality showed a significant negative correlation with sustained attention (r = − 0.589, p < 0.001), and smartphone addiction was also negatively correlated with sustained attention (r = − 0.511, p < 0.001). Conclusion The study concludes that higher levels of smartphone addiction are linked to poorer sleep quality and diminished sustained attention among young adults.