LS variable metadata
Variable: MOAGMTNB
Table: NBIR
Short description: Age (months since last birthday) of mother at new birth on sample date.
Full description:  
Coding notes: 00-11 = Completed months since last birthday
1971-1985:
space= Age of mother stated, rather than date of birth, or Age substituted on draft form
1986 onwards:
Month assumed to be 06 if age of mother, rather than date of birth, stated on the draft form in answer to confidential particulars Question 2 Note: 'Age of mother at maternity': Calculated using date of birth of child and date of birth of mother, and - 1971-1985 - Imputed if mother's date of birth not stated 1986 onwards - Imputed if mother's year of birth is 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 entry for Births (Form 309): derived from Question 1 and Confidential particulars Question 2
Former name of variable: MOAGMTCNB
Derived: N
Derivation: Not available
Subject:  
Date range:  
Keyword: Fertility Age
Classification:  
Comparable variables for other individuals:  
Comparable variables for other times:  
Restricted: N
Data type: Text
Length of field: 2
Reference 1: See LS Technical Volume (Hattersley and Creeser, 1995) p342 (live birth registration draft entry form), p345 (record of live birth form), pp24-25, pp94-95 (general details), pp99-101 (comparability of data), pp109-115 (data quality).