R - Derived Variables

The main survey was conducted by a nurse

Derived Variables
SMOK42_1(Derived): Smoking at 42 codes 0 to 2
SMOK42_2(Derived): Smoking at 42 codes 0 to 6
SC42_1(Derived): Social Class at 42
SC0_1(Derived): Social Class at birth
REG0_58(Derived): Region at birth (based on pre-1974 regions)
REG46_58(Derived): Region at age 46 (based on pre-1974 regions)
REG46_04(Derived): Region at age 46 (based on post-1974 regions)
BRESPS0(Derived): Final outcome code
BRESPS1(Derived): Summary of cohort, issued sample and response to biomed
Question:
None
Question Asked:
None
Respondent:
None
Keywords:

Valid:
9377
Missing:
0
Minimum:
101.0
Maximum:
103.0
Coding Frame:
None
Derivation:
None
Derivation Code:
Notes:
None

Tabulation:
ValueLabelFreq. % 
101Productive9339 99.6 
102Productive - dress rehearsal29 0.3 
103Lost productive - some data, no CAPI9 0.1 
201Issued but ineligible - dead0 0.0 
202Issued but ineligible - living outside GB0 0.0 
301Refused0 0.0 
302Data withdrawn after interview0 0.0 
401Invalid address0 0.0 
402No contact made at address0 0.0 
403Moved to unknown address0 0.0 
404Unavailable for interview0 0.0 
405Other reason for no interview0 0.0 
501Ineligible: dead0 0.0 
502Ineligible - living outside GB0 0.0 
601Permanent refusals0 0.0 
901NCDS6 by proxy0 0.0 
902Not issued for another reason0 0.0 
903Not in sample data base0 0.0 
BRESPS2(Derived): NCDS biomedical response - all cohort