Metadata Definition in Registries: What Is a Data Element?

Area of Science:

• Health Informatics
• Data Management
• Observational Research

Background:

• Observational research relies on established guidelines for registry development and operation.
• Metadata management, including data elements and value sets, is fundamental to registry implementation.

Purpose of the Study:

• To analyze metadata management practices in German health registries.
• To identify inconsistencies in the interpretation of data elements across registries.
• To underscore the need for standardized metadata representation.

Main Methods:

• Examined metadata from six German health registries.
• Assessed the diversity in the conceptualization of data elements.
• Analyzed how different perspectives (research questions, data acquisition, storage) influence data element catalogs.

Main Results:

• Significant divergence in the interpretation of 'data elements' was observed among the studied registries.
• Registry metadata catalogs reflected varied approaches to research questions, data acquisition, and storage.
• A lack of a universal standard for metadata representation was evident.

Conclusions:

• A comprehensive catalog of data elements is essential throughout a registry's life cycle.
• Catalogs must be dynamically updated to accommodate evolving perspectives.
• Current tools for metadata management, particularly concerning FAIR principles, require further development.