This dialog is displayed if you select a database on the Data Tab that has groupings not found in the Event Variable. When there are Event Variable groupings in the MP-SIR case database that are not found in the referent rate file, use this dialog to indicate which of those groupings are to be treated as events in analysis.
Check the boxes next to the groupings to include and click OK. Clicking the All button checks the boxes next to all of the groupings. Clicking Clear unchecks all of the boxes.
Check Check Selected Groupings as Events of Interest to have any groupings of events that are checked show up in the MP-SIR Events Tab as events of interest by default.