Abstract
The Clinical Data Warehouse is a result of utilizing data warehouse technology in medical field. The clinical data usually collect from various sources (Clinical information system, and Patient data management system), and stored into data warehouse to be analyzed to make better use of their clinical data in order to Support decision making. The diversity of the nature of clinical data from other business data produces several challenges. These challenges include the clinical data format, business analysis, data integration, data quality, and ETL process. The paper is discussing the issues and challenges to address developing of a successful Data Ware Housing for medical organization, which provide a rich knowledge environment to support effective decision making and support research work. The paper concluded significant handling of these issues which affect the development phase of the Clinical Data Warehouse systems. Keyword: Data Warehouse (DWH), Clinical Data warehousing (CDWH), Data quality, ETL process
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