This dataset contains supplementary materials for the article titled "Causal Associations Between Sleep Disorders and Delirium: A Bidirectional Mendelian Randomization Analysis". It includes additional data, figures, tables, and methodological details that support the findings and analyses presented in the main article. The supplementary files provide further insight into the statistical models, data sources, and results, which were used to assess the causal relationship between sleep disorders and delirium. These materials are intended to facilitate a deeper understanding of the research and enhance reproducibility.