Questionnaire item | Original answer category | Recoded variables for cross-sectional analyses (baseline) | Longitudinal analyses | ||
---|---|---|---|---|---|
Recoding (% or mean ± SD) | New variables based on recoding | ||||
Family situation | How would you describe your family situation? | B: 1 = single; 2 = having a partner, but living independently; 3 = living with a partner; 4 = married; 5 = widow/widower | 0 [not living with a partner (=1/2/5) = 20.9 %]; 1 [living with a partner (=3/4) = 79.1 %] | - | - |
Occupational classification | What is your occupational classification? | B: 1 = white collars; 2 = blue collars; 3 = others, i.e. household or no-paid job | Dummy1: 0 [others and white collars = 80.7 %]; 1 [blue collars = 19.3 %] | - | - |
Dummy2: 0 [others and blue collars = 26.7 %]; 1 [white collars = 73.3 %] | |||||
Educational level | What is your highest achieved diploma or certificate? | B: 1 = primary school; 2 = secondary education; 3 = higher education, non-university; 4 = university | 0 [low educational level (=1/2) = 47.8 %]; 1 [high educational level (=3/4) = 52.2 %] | - | - |
Sex | What is your sex? | B: 1 = male; 2 = female | 0 [female]; 1 [male] | - | - |
Occupational status | At the moment I have/work/am/do … | B: 1 = full-time job; 2 = part-time job; 3 = household; 4 = unemployed/job-applicant; 5 = career interruption; 6 = retired; 7 = student | 0 [not working (=3-7) = 11.0 %]; 1 [working (=1-2) = 89.0 %] | 1-2 → 1–2 OR 3–7 → 3–7 (stable = 93.5 %); 1–2 → 3–7 (stop working = 4.9 %); 3–7 → 1–2 (start working = 1.6 %) | 0 = stable 1 = stop working 2 = start working |
FU: 1 = full-time job; 2 = part-time job; 3 = household; 4 = unemployed/job-applicant; 5 = career interruption; 6 = retired; 7 = student | |||||
Residential area | In which type of area do you live? | B: 1 = countryside; 2 = village or town; 3 = cities suburbs; 4 = city | 0 [countryside and village/town = 31.5 %]; 1 [cities suburbs and city = 68.5 %] | 1 → 1 OR 2 → 2 OR 3 → 3 OR 4 → 4 (stable = 94.4 %); 1–2 → 3–4 (increase = 1.1 %); 3–4 → 1–2 (decrease = 4.5 %) | 0 = stable 1 = increase 2= decrease |
FU: 1 = countryside; 2 = village or town; 3 = cities suburbs; 4 = city | |||||
Depressive symptoms | a) During the past month, have you often been bothered by feeling down, depressed, or hopeless? b) During the past month, have you often been bothered by little interest or pleasure in doing things? | a) B: 1 = yes; 2 = no b) B: 1 = yes; 2 = no | 0 [no depressive symptoms (=answered “no” on both questions) = 79.6 %]; 1 [depressive symptoms (=answered “yes” on at least one of the questions) = 20.4 %] | B: Positive test (answered “yes” on at least one of the questions = 20.4 %); negative test (answered “no” on both questions = 79.6 %) | 0 = stable 1 = developing depressive symptoms 2 = disappearance of depressive symptoms |
a) FU: 1 = yes; 2 = no b) FU: 1 = yes; 2 = no | FU: Positive test (answered “yes” on at least one of the questions = 20.0 %); negative test (answered “no” on both questions = 80.0 %) | ||||
Children living at home | How many of your children still live at home? | B: … child(ren) FU: … child(ren) | 0 [no child(ren) at home = 44.6 %]; 1 [yes, child(ren) at home = 55.4 %] | B: not having a child (28.4 %); not having a child still living at home (16.2 %); having child(ren) living at home (55.4 %) | 0 = stable 1 = getting child(ren) 2 = no children living at home |
FU: not having a child (23.9 %); not having a child still living at home (21.7 %); having child(ren) living at home (54.3 %) | |||||
Body Mass Index (BMI) | Self-reported height and weight | B: … cm/… kg | … kg/m2 | / | follow-up BMI minus baseline BMI |
FU: … cm/… kg |