Randomized controlled trial flow diagram template

flowchart TB
    A[Define question and hypothesis] --> B[Ethics approval]
    B --> C[Screen participants]
    C --> D{Meets eligibility criteria}
    D -->|No| E[Excluded]
    D -->|Yes| F[Informed consent]
    F --> G[Baseline data]
    G --> H[Randomization]
    H --> I[Intervention arm]
    H --> J[Control arm usual care]
    I --> K[Scheduled follow-up]
    J --> K
    K --> L[Record dropouts and adverse events]
    L --> M[Assess outcomes]
    M --> N[Statistical analysis]
    N --> O[Conclusions and discussion]

Draw a randomized controlled trial flow diagram with Mermaid flowchart TB syntax. Define the question and hypothesis, obtain ethics approval, and screen participants. Those who do not meet eligibility criteria are excluded; those who do give informed consent, provide baseline data and are randomized into an intervention arm and a control arm. Both arms have scheduled follow-up, then dropouts and adverse events are recorded, outcomes assessed, statistical analysis done, and conclusions drawn. Use a diamond for the decision and no parentheses in node text. Output only the mermaid code block.