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Clinical data for an item group (record). The model supports nested and repeating item groups (for example, when several previous hospitalizations are reported in one history), or within reference data.corresponding to an ItemGroupRef defined in the active MetaDataVersion.
The ItemGroupOID and ItemGroupRepeatKey are used together to identify a particular item group. This pair of values uniquely identifies an ItemGroup within the containing StudyEvent. The ItemGroupRepeatKey is present if and only if the ItemGroupDef is repeating.
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ItemGroupData can also occur as reference data. In that case, the ItemGroupOID and ItemGroupRepeatKey pair must be unique within the reference data.
The model supports nested and repeating item groups.
Example: Multiple Selection Using Nested ItemGoupDef
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