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
BRESPS2(Derived): NCDS biomedical response - all cohort
Question:
None
Question Asked:
None
Respondent:
None
Keywords:

Valid:
9377
Missing:
0
Minimum:
1.0
Maximum:
1.0
Coding Frame:
None
Derivation:
None
Derivation Code:
Notes:
None

Tabulation:
ValueLabelFreq. % 
1some data9377 100.0 
2no data (dead)0 0.0 
3no data (temporary emigrant)0 0.0 
4no data (permanent emigrant)0 0.0 
5no data (refusal)0 0.0 
6no data other (contact later)0 0.0 
7no data other (no contact later)0 0.0 
8Not issued0 0.0 
9Not in sample database0 0.0