> ## Documentation Index
> Fetch the complete documentation index at: https://glossary.micahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Baseline characteristics

Initial health data and demographics collected from all participants before the study treatment begins, including factors like age, gender, race, and relevant medical measurements.

[*Source*](https://clinicaltrials.gov/study-basics/glossary)