Impact of Caffeine use on Adults' Sleep & Memory

This study aimed to investigate the relationships between caffeine consumption, sleep quality, and memory performance among adults aged 26 to 44 years. Using a correlational research design, 100 participants from Allied Hospital II in Faisalabad, Pakistan, were recruited through purposive sampling. Participants completed three standardized and validated questionnaires: the Caffeine Consumption Questionnaire (CCQ), the Cognitive Failures Questionnaire (CFQ), and the Pittsburgh Sleep Quality Index (PSQI). Descriptive analyses indicated moderate caffeine consumption and variable cognitive failures and sleep quality across the sample. Correlational analyses revealed significant positive relationships among caffeine intake, cognitive lapses, and sleep quality. Multiple linear regression analysis demonstrated that caffeine consumption, cognitive failure, and sleep quality together explained 33% of the variance in the dependent outcome, with each predictor showing significant contributions. Independent samples t-tests identified gender differences, with females reporting higher caffeine intake and poorer sleep quality compared to males, while cognitive failure scores were similar across genders. The findings suggest that habitual caffeine use may influence cognitive functioning, particularly long-term memory, and that sleep quality is an important factor interrelated with both caffeine consumption and cognitive performance. These results highlight the importance of considering lifestyle factors such as caffeine intake in cognitive and behavioral health research. Limitations related to self-reported data and cross-sectional design are acknowledged. Future research using longitudinal methods and more diverse populations is recommended to clarify causal pathways and inform tailored public health guidelines on caffeine use.