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Maternity-related information for an admission (where applicable)
Encoded participant identifier. This identifier is the same encoded id used in the main dataset.
Instance index. A numerical index which together with the eid uniquely identifies this record, i.e. eid & ins_index together form a primary key for this table. The ins_index will not generally index records in chronological order. The record in HESIN corresponding to a particular HESIN_MATERNITY record will have the same eid & ins_index.
Reason for changing delivery place. Reason for changing delivery place identifies whether a decision was made during pregnancy or labour, and the reasons for the change (address change, clinical or other reasons).