*1.2. Research Methodology*

For this review, we focused on exploring major questions related to big data analytics in healthcare. We conducted a thorough search of the literature articles indexed in Scopus, Web of Science, Science Direct, and other reputable databases. We used a combination of keywords and Boolean operators to refine our search, including terms related to big data analytics, healthcare, and data analysis. We selected articles based on their relevance to our research question, as well as their citation count and impact factor. Using Zotero, a reference managemen<sup>t</sup> tool, we organized the selected articles and made notes on their content and findings. We also reviewed relevant conference proceedings to ensure the comprehensive coverage of the topic. By conducting a thorough review of the literature, we aimed to provide a comprehensive overview of the current state of knowledge on big data analytics in healthcare. Figure 1 presents the research methodology used.
