ABSTRACT INTRODUCTION Sleep deprivation is a critical concern among medical professionals, particularly clinical postgraduate doctors who face irregular schedules and high-stress environments. Chronic sleep deprivation impacts cognitive performance, emotional stability, and patient safety. This study aims to assess the prevalence of sleep disturbances and their association with daytime sleepiness among clinical postgraduate doctors. MATERIALS AND METHODS A cross-sectional study was conducted among 103 clinical postgraduate doctors aged 20–35 years at a rural tertiary care hospital. Participants completed two validated instruments: the Regensburg Insomnia Scale (RIS) and the Epworth Sleepiness Scale (ESS). Insomnia was defined as RIS ≥13, and excessive daytime sleepiness as ESS ≥11. Statistical analyses included descriptive statistics, chi-square tests, and odds ratio calculations. RESULTS Insomnia was observed in 39.8% (n=41) and excessive daytime sleepiness in 53.4% (n=55) of participants. A significant association between insomnia and daytime sleepiness was found (χ²=25.88, p<0.001; OR=12.25). Sleep disturbances were more prevalent among females, unmarried individuals, and those aged 26–30 years. CONCLUSION The study reveals a high prevalence of sleep deprivation and a strong correlation between insomnia and daytime sleepiness among clinical postgraduate doctors. These findings underscore the urgent need for institutional measures such as regulating work hours, promoting sleep hygiene, and providing mental health support to mitigate the adverse effects of chronic sleep loss on healthcare professionals and patient care.

Sleep Deprivation, Insomnia, Daytime Sleepiness, Postgraduate Doctors, Cross-Sectional Study.