Context:
The client has conducted a real-world evidence study to evaluate the effectiveness of a new oncology drug compared to standard treatment where the HEOR team, responsible for preparing datasets, running analyses, and generating outputs for regulatory submission.

Resolution:
Our team developed build a patient cohort: adults diagnosed with metastatic breast cancer (ICD-10 C50.x) and identified new drug and standard therapy. They had to perform time-to-event analysis and generate summary tables. They used R to cross check survival analysis and handled missing lab values.

Result:
Document assumptions, flag data quality issues early, provide mock shells before final outputs.