Figure 3.

The data model for CARAT is lightweight, combining an individual’s responses with their study-specific information and response validation prior to inserting the information in the database. The upper row indicates those parts of the model that draw from study setup, while the lower row indicates the parts that are populated during data collection. The solid bulleted connections indicate a many-to-one relationship: a single CRF pulls from many questions, and a completed assessment includes several responses.