LS variable metadata
Variable: MMAGYRIM
Table: IDFI
Short description: Age of mother at maternity - years.
Full description:  
Coding notes: Numeric in range 11-55 (may be substituted)
1971-1985:
Calculated using data of birth of child and date of birth of mother, imputed if mother's date of birth not stated
1986 onwards:
Calculated using date of birth of child and date of birth of mother, imputed if mother's year of birth not stated. If only day and/or month of mother's birth is not stated, day and/or month of maternity is substituted.
Notes:  
Units of measurement:  
Source: Draft live birth entry form 309, Draft stillbirth entry form 308 Derived from date of birth of mother and date of birth of child
Former name of variable: MMOAGYRBIM
Derived: Y
Derivation: Not available
Subject:  
Date range:  
Keyword: Age
Classification:  
Comparable variables for other individuals:  
Comparable variables for other times:  
Restricted: N
Data type: Numeric
Length of field: 2
Reference 1: See LS Technical Volume (Hattersley and Creeser, 1995), page 343 (death registration draft entry form), page 25 and page 96 (general details), pp. 99-104 (comparability), pp. 141-145 (data quality).