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The Operation class is used in the operations attribute of the AnalysisMethod class to define the statistical operations to be performed for any analysis that references the analysis method.

Example
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Examples of operations include:

  • "Count of subjects by group" and "Percent of subjects by group" in a "Summary by group of a categorical variable" method.
  • "Mean", "Standard Deviation", "Minimum Value", "Maximum Value", and confidence intervals in a "Summary by group of a continuous variable" method.
  • "P-value" in a "Pearson's chi-square test group comparison for a categorical variable" method.

Each operation generates a single result for each combination of groups in "results-by-group" grouping factors referenced by an analysis that references the analysis method containing the operation (see the Analysis and OperationResult sections for more information about "results-by-group" grouping factors). Each result is generally expected to represent a single value, but sponsors may choose to define operations that generate composite results as a combination of more than 1 individual value. However, the disadvantage of composite results is that there will not be individual metadata elements to describe each component of a composite result. A better approach is to define operations that generate individual result values and then, if necessary, combine the result values from these operations to produce a composite value for display.

Excerpt Include
ARSP:ER Diagram: Operation
ARSP:ER Diagram: Operation

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