Table 1 Questions, response alternatives, and variable definitions

Educational level

What is your highest completed education?

Primary school/folk high school up to 10 years, vocational training/high school minimum 3 years, college/university less than 4 years, college/university 4 years or more

Low education (reference)

Middle education (13 years of education)

High education (14 + years of education)

Age

Retrieved from the Central Population Register

≥ 18 years old

Continuous variable (reference; low)

Physical activity

On an average, how often do you exercise in your leisure time?

Never, less than 1 time per week, 1 time per week, 2–3 times per week, 4–5 times per week, each day

High physical activity (≥ 150 min moderate intensity or ≥ 75 min high intensity / week)

Low physical activity (reference)

On an average, how hard do you exercise?

Calm without getting out of breath or sweating, getting out of breath and sweating, takes me completely out

On an average, how long do you exercise each time?

Less than 15 min, 15–29 min, 30 min-1 h, more than 1 h

Diet

How often do you eat fruit and berries (do not include juices)?

Rarely/never, 1–3 times each month, 1 time per week, 2–3 times per week, 4–6 times per week, daily

High consumption (both fruit and vegetables daily and fish ≥ 2 times / week)

Low consumption (reference)

How often do you eat vegetables, included salads (do not include potatoes)?

How often do you eat fish (as topping on bread, for lunch or dinner)?

Tobacco

How often do you smoke?

Daily, sometimes; not now, but daily in the past; not now but sometimes in the past; have never smoked

Non-smoker (never, not now but in the past)

Smoker (reference)

Alcohol

Have you ever drunk any kind of alcoholic beverage?

Yes, no.

High alcohol consumption (a total score of ≥ 5)

Low alcohol consumption (reference)

Within the last 12 months, how often have you had a drink containing alcohol?

Never, ≤ once / month, 2–4 times / month, 2–3 times / week, ≥ 4 times / week

How many drinks containing alcohol do you have on a typical day of drinking?

1–2, 3–4, 4–5, 5–6, 7–9, ≥ 10

How often do you have six or more drinks on one occasion?

Never, ≤ once / month, monthly, weekly, daily or almost daily