The Selection tab is used to define the analysis cohort using:
selection statements based on specific variables within each record, and/or
multiple primary and person selections based on variables from multiple records for the same person.
Multiple primary and person selections are fully implemented in Frequency and Case Listing sessions, have limited features in Rate, Limited-Duration Prevalence, and MP-SIR sessions, and are not available at all in Survival sessions.
For more detailed, session-specific instructions on the use of Selection tabs, see:
The Selection Tab and Table Tab are often confused; please read Selection Tab vs. Table Tab to avoid common mistakes.
There are two basic mechanisms for making selections: building selection statements and using standard options. If no selections are made, then your analysis cohort will include every case in the database.
Depending on the session type, the Selection tab may have one to three boxes in which to build selection statements. Create selection statements in these boxes to reduce the number of records analyzed based on specific variables. Rate and prevalence sessions require variables from standard population, population, and case data files. Therefore, these session types have three boxes to allow you to make selection statements for each type of variable. Session types that only require case variables, such as Case Listing and Frequency sessions, have only one selection statement box.
Selection options are check boxes, drop-down lists, or other controls that implement commonly used selection statements. In most cases, it is possible to use selection statements to define the same criteria as selection options; the options simply provide a shortcut.
The selection options available vary depending on the session type. In some cases, certain selections are either unavailable or mandatory. This may be indicated by the control being present but disabled.
When you unmark a selection check box, SEER*Stat may display a warning message about the effect this change has on your analysis.