<![CDATA[Sleep disorders are conditions that impair the quality, quantity, or duration of sleep, leading to adverse physiological and cognitive effects during daytime functioning. Among shift workers, the prevalence of sleep disturbances remains high and may be influenced by lifestyle factors such as frequent consumption of coffee with high levels of caffeine. This study aimed to determine the relationship between the frequency of black coffee consumption and sleep disorders among shift workers at PT. X. This research employed a quantitative analytical design with a cross-sectional approach. A total of 93 shift workers were selected using simple random sampling. Data were collected through questionnaires, including the Pittsburgh Sleep Quality Index (PSQI) to assess sleep disturbances and the Semi-Quantitative Food Frequency Questionnaire (SQ-FFQ) to measure coffee consumption frequency. Bivariate analysis was conducted using Fisher’s exact test. The results showed that the prevalence of sleep disorders among respondents was 89,2%. Statistical analysis revealed a p-value of 0.200 (p > 0.05), indicating no significant relationship between the frequency of black coffee consumption and sleep disorders.]]>
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