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This overview outlines essential elements in the analysis of treatment approaches for subjects in clinical trials. We explore critical questions such as who gets analyzed and how subjects are grouped for analysis. We differentiate between two primary analysis methods: Per Protocol, which focuses on fully compliant subjects with no missing data, and Intention to Treat, which analyzes all randomized subjects using available data. Understanding these methodologies is vital for interpreting clinical trial results and ensuring valid conclusions.
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1. Key Issues in Analysis
Who gets analyzed?
How are they grouped for analysis?
2. Approaches Treatment received (also referred to as per protocol or as treated) Analyze only fully eligible and compliant subjects with no missing data, e.g., valid and evaluable subjects Intention to treat (also referred to as full analysis set and as randomized) Analyze all randomized subjects utilizing as much information from each as possible