Clinical research is the branch of medical science that studies **how diseases are detected, prevented, diagnosed, and treated in people**. Unlike laboratory or animal studies (preclinical research), clinical research involves **human participants** and aims to translate scientific discoveries into practical medical applications. --- ### 🔹 Main Features - **Human-centered**: Conducted with volunteers (patients or healthy participants). - **Evidence-based**: Collects data on safety, efficacy, and outcomes. - **Regulated**: Must follow ethical guidelines (e.g., Declaration of Helsinki, Good Clinical Practice). - **Phased approach**: Especially in drug and device development. --- ### 🔹 Types of Clinical Research 1. **Clinical Trials** - Structured studies testing new drugs, medical devices, or procedures. - Often divided into phases (Phase I–IV). 2. **Observational Studies** - Researchers observe outcomes without assigning interventions. - Examples: cohort studies, case-control studies, registries. 3. **Epidemiological Research** - Examines patterns, causes, and effects of health and disease in populations. 4. **Translational Research** - Bridges the gap between laboratory discoveries and patient care (“bench to bedside”). 5. **Health Services Research** - Studies delivery, accessibility, quality, and cost of healthcare.