0 = femal
1 = male

in couple
0 = single
1 = couple

partner employed
0 = other
1 = partner employed

aged less than 41
0 = other
1 = age less than 41

aged 41-59
0 = other
1 = aged 41-59

aged 60 or more
0 = other
1 = aged 60 or more

has higher qualification
0 = other
1 = has higher qualification

Goldthorpe Service Class
0 = other
1 = Goldthorpe Service class

Has manageriall reponsibility
0 = other
1 = manager

Bottom half in 92
0 = other
1 = bottom half of household income range 92

Third Quartile in 92
0 = other
1 = third quartile in 92

76-90% band in 92
0 = other
1 = 76-90% band in 92

Top decile in 92
0 = other
1 = top decile in 92

0 = Not Selected
1 = Selected