Abstract base class for clinical studies. Provides common properties shared by all study types.
Arguments
- study_id
Character string for study identifier
- study_title
Character string for study title
- design
Character string for study design: "rct", "observational", "single-arm"
- population
Character string for population (e.g., "ITT", "FAS", "PP")
- endpoints
List of Endpoint objects
- results
List of analysis results
- risk_of_bias
Risk of bias assessment result (optional)
- metadata
List of additional metadata
