Table 1. The socio-demographics and lifestyle covariates selected for this study.
Covariates | Coding |
---|---|
Gender | 1 = Male 2 = Female |
Age | Coded as 16–18 and then in 5 years increments (19–23; 24–28; 29–33; 34–38; 39–43; 44–48; 49–53; 54–58; 59–63; 59–63; 64–68; 69–73; 74–78; >78) |
Ethnicity | 1 = British white 2 = Other white 3 = Indian 4 = Pakistani/Bangladeshi 5 = Black/African/Caribbean 6 = Mixed ethnicities 7 = Other ethnicities |
Country of birth | 1 = Born in UK 2 = Not born in UK 3 = No answer |
Marital status | 1 = Married 2 = Living as a couple 3 = Widowed 4 = Divorced/separated 5 = Single never married 6 = No answer |
Educational qualification | 1 = University degree 2 = High school degree 3 = Lower educational qualifications 4 = Other qualifications 5 = Still a student |
Occupation | 1 = Managers/Professionals/employers 2 = Non manual workers 3 = Manual workers 4 = Not applicable: Student/retired/Not working 5 = No answer |
Perceived financial situation | 1 = Living comfortably/doing alright 2 = Living difficultly 3 = No answer |
Cigarette smokinga | 0 = Non-smoker 1 = Smoker 2 = No answer |
Cigarette smokinga: data for cigarette smoking were missing for wave 1 responses and for waves 3 and 4 among individuals aged more than 21 years. Therefore, we replicated the smoking status responses of wave 2 in wave 1 for each individual and in waves 3 and 4 for each individual aged more than 21 years. The smoking status in waves 1, 3, and 4 was coded into “no answer” for individuals who were not present in wave 2.