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The GroupingFactor class is used in the reporting event's analysisGroupings attribute to define grouping factors, which are characteristics used to subdivide the subject population or analysis dataset records into groups for analysis. Examples of grouping factors include subject characteristics (such as sex or age group), planned or actual treatment, "system organ class" or "preferred term" in an adverse events analysis dataset, and "parameter" or "visit" in a vital signs analysis dataset. Each grouping factor may either contain a set of specified groups (e.g., “Male” and “Female” for a sex grouping) or be defined as "data-driven", where the group values are obtained from the data (e.g., "system organ class" or "preferred term" for adverse events).
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