-9 = no answer/refused
-8 = don't know
-6 = schedule not obtained
-2 = schedule not applicable
-1 = item not applicable
0 = men
1 = women

Age last birthday
-9 = refusal (998)
-8 = don't know (999)
-6 = schedule not obtained
-2 = schedule not applicable
-1 = item not applicable

Ethnic group
-9 = refusal (8)
-8 = don't know (9)
-6 = schedule not obtained
-2 = schedule not applicable
-1 = item not applicable
1 = white
2 = mixed ethnic group
3 = black
4 = black british
5 = asian
6 = asian british
7 = any other group

Diagnosed with diabetes by a doctor
0 = no
1 = yes

Cholesterol values
-9 = no answer/refused
-8 = don't know
-6 = schedule not obtained
-2 = schedule not applicable
-1 = item not applicable

Body fat
1 = low fat
2 = medium fat
3 = high fat

Obese (BMI >30)
0 = less than 30
1 = 30 and over

Social class: non-manual vs manual
0 = non-manual
1 = manual

Income level
0 = med and high
1 = low income

Active or not
0 = active
1 = inactive

Smoking status binary
1 = never smoked
2 = ex-smoker
3 = current smoker

alcohol consumption over the weekly limit
0 = <3-4 units/day (men), 2-3 (women)
1 = >3-4 u/day (men), 2-3 (women)