Questionnaire complete?
0 = No
1 = Yes

Male = 0
Other = 2
Female = 1
Would prefer not to say = 3

1 = I am employed
2 = I am unemployed
3 = I am volunteering
4 = I am retired
5 = I am a student

Highest completed level of education
1 = School
2 = College or sixth form
3 = Vocational qualification
4 = Bachelor Degree (BA/BSc)
5 = Postgraduate Diploma
6 = Master's Degree (MA/MSc)
7 = Doctorate or PhD

Control item correct?
0 = Incorrect
1 = Correct
99 = Missing