![]() If the study is longitudinal with multiple follow-up visits then an additional column is often used to store the visit number. The EAV model can be viewed as a database table with three columns one column specifies the entity (eg, participant ID), one for the attribute (eg, cognitive test), and one for the value of the attribute (eg, cognitive test score). Additionally, more attributes can be easily added without changing the underlying schema. Through the use of such a schema, hundreds of clinical attributes (or variables) can be stored in a single table without having to create multiple tables. Typically, EDC and EDM systems employ a generic EAV schema. Some of the popular EDC and EDM systems include OpenClinica, LabKey, Onyx, Opal, REDCap, entity-attribute-value (EAV) with classes and relationships (EAV/CR), and Informatics for Integrating Biology & the Bedside (i2b2 ). ![]() Such systems include built-in sanity checking and quality control procedures to ensure the data captured is consistent and well formatted for ease of downstream analysis. They typically comprise a powerful database engine accessible over the network using Web-based technologies. Such systems are developed to centrally manage the recruitment and storage of participant details. Electronic data capture (EDC) and electronic data management (EDM) systems are a key requirement for studies in modern biomedical science.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |