LS variable metadata
Variable: DOCONBM
Table: SBSM
Short description: Date of conception for this birth.
Full description:  
Coding notes: FORMAT: YYYYMMDD
Units of measurement:  
Source: Derived using date of birth minus gestation period. If a gestation period is known, a further gestation period will be calculated by deducting 14 days. If the result is less than zero the gestation period will be zero. If no gestation period is known, then a period of 231 days is used.
Former name of variable:  
Derived: Y
Derivation: Not available
Date range: From: 19970101  
Keyword: Fertility
Comparable variables for other individuals:  
Comparable variables for other times:  
Restricted: N
Data type: Text
Length of field: 8