Leaf is a powerful, fun, lightweight web application for querying clinical data. Leaf helps query clinical databases of nearly any data model for cohort estimation and data extraction. Leaf seamlessly integrates with clinical databases and existing enterprise authentication systems to unleash the potential of translational biomedical research.

• Flexible: Clinical databases come in all shapes and sizes. Leaf can work with nearly any clinical data model, including the OMOP Common Data Model, i2b2 and SHRINE, or other proprietary or non-standard data models. Add Leaf as a sidecar to an existing data warehouse.
• User Friendly: Leaf is designed to be simple, intuitive, and fast. Searching for diagnosis or procedural codes, labs, or whatever you point Leaf to is easy.
• Secure: Security of protected health information is critical to any healthcare organization. Leaf implements current best security practices to make clinical data both accessible and safe.
• Open: Curious how Leaf works, how you can help, or how you can use Leaf to help researchers at your CTSA? Let us know! Leaf is an open-source project by CTSAs, for CTSAs.

Leaf is developed by real people passionate about translational biomedical science and software engineering. 😃

See a demo of Leaf in action at https://www.youtube.com/watch?v=ZuKKC7B8mHI

• How Leaf can help accomplish research
• Architecture
• Installation
• The Building Blocks of Leaf: Concepts

Sure! Leaf is in active development and will evolve as development continues and features are added.