LS variable metadata
Variable: MOPLBINB
Table: NBIR
Short description: Place of birth of mother of new birth on sample date.
Full description:  
Coding notes: The coding of MOPLBINB has used three distinct coding schemes: one from 1971 to 1991, one from 1992 to 2006 and one from 2007 onwards. It is therefore essential to use MOPLBINB in conjunction with BIYRANB (year of birth registration). Code is available at http://www.celsius.lshtm.ac.uk/derive/cobnbir.html to derive three separate variables from MOPLBINB (one for each coding scheme) and add labels to them.

1971-1985:
A/ Within England and Wales - County (1st & 2nd digits) and County District of birth (3rd & 4th digits) (see 1971 Census Appendix 12), fifth digit='9'
B/ In Scotland - County and City (see Events Appendix 10), fifth digit='9'
C/ In Northern Ireland - County and County borough (see Events Appendix 10), fifth digit='9'
D/ Places outside UK - first two digits '99', third and fourth characters coded to country of birth 1W-9W (see 1981 Census Appendix 4 ),fifth digit blank
1986 onwards:
Last two characters coded to country of birth 1W-9W as above. First three characters set to Spaces (see 1981 Census Appendix 4)
Notes: From April 1991 onwards usual residence codes are OGSS codes, not STATS or CENSUS codes.
Units of measurement:  
Source: Draft entry for live births (Form 309): Question 8
Former name of variable: MOPLBIANB
Derived: N
Derivation: Not available
Subject:  
Date range:  
Keyword: Geog
Classification:  
Comparable variables for other individuals:  
Comparable variables for other times:  
Restricted: N
Data type: Text
Length of field: 5
Reference 1: 1971 Census Appendix 12a
Reference 2: Events Appendix 10
Reference 3: 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).