| # | Column | Type | Notes |
|---|
| 1 | eid | integer | Encoded participant identifier. This identifier is the same encoded id used in the main dataset. |
| 2 | ins_index | integer | 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. |
| 3 | numbaby | integer, coding 221 | Number of babies delivered from single pregnancy. No longer available for source=71 (April 2018) onwards. |
| 4 | numpreg | integer, coding 222 | Number of previous pregnancies. |
| 5 | anasdate | date | Date of first antenatal assessment. |
| 6 | anagest | integer | Gestation period at first antenatal assessment. |
| 7 | antedur | integer | Antenatal days of stay. |
| 8 | delinten | integer, coding 217 | Intended delivery place. Intended delivery place identifies where the birth was planned to take place; for example: NHS hospital (with ward information) or at a domestic address. |
| 9 | delchang | integer, coding 215 | 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). |
| 10 | delprean | integer, coding 212 | Anaesthetic administered during delivery. This field identifies, for example, whether a general anaesthetic or an epidural was administered either before or during labour. |
| 11 | delposan | integer, coding 212 | Anaesthetic delivered post delivery. This field identifies, for example, whether a general anaesthetic or an epidural was administered after labour or not. |
| 12 | delonset | integer, coding 220 | Delivery onset method. Delivery onset method identifies whether the onset of labour was spontaneous or clinically induced. |
| 13 | postdur | integer | Postnatal stay. |
| 14 | matage | integer | Mother age on date of delivery. |
