Table 1 Overview of the self-reported health questions, their answer categories used in the second COVID-19 Health Survey and the related indicators, Belgium 2020

How tall are you without clothes and shoes?

Length in centimeters

Weight status

1. Underweight (BMI < 18.50)

2. Normal weight (BMI = 18.50–24.99)

3. Overweight (BMI = 25.00–29.99)

4. Obesity (BMI ≥ 30.00)

How much do you weigh without clothes and shoes?

Body weight in kilogram

Since 13 March 2020, has your body weight changed?

1. Yes, lost weight

2. Yes, gained weight

3. No, my body weight remained stable

4. Don’t know

Weight gain

1. Yes (category 2)

2. No (categories 1 and 3)

Since 13 March 2020, has the consumption of the following foods increased, remained unchanged or decreased?

 - sugared-sweetened beverages, i.e. lemonade, cola or ice tea (no ‘light’)

 - Sweet or salty snacks such as candy, chocolate, cake, biscuits, ice cream, chips,...

 - Food prepared out-of-home such as fries, sandwiches, takeaway, home delivery via apps, caterer,...)

1. Increased

2. Remained unchanged

3. Decreased

Change in the consumption of sugared-sweetened beverages

Change in the consumption of sweet or salty snacks

Change in the consumption of food prepared out-of-home

1. Increased

2. Unchanged

3. Decreased

Since 13 March 2020, have you changed your physical activity habits (walking, cycling, sports...)?

1. I’ve never done physical activity and now neither

2. I’ve never done any physical activity, but I’ve started now

3. I’m doing more physical activity now

4. I do as much physical activity

5. I’m doing less physical activity now

Change in physical activity

1. Increased (categories 2 and 3)

2. Unchanged (categories 1 and 4)

3. Decreased (category 5)

Since 13 March 2020, have you modified your usual consumption of alcohol?

1. I don’t use

2. I started using (again)

3. More than usual

4. Less than usual

5. Same as usual

6. I stopped using since then

Change in alcohol consumption

1. Increased (categories 2 and 3)

2. Unchanged (categories 1 and 5)

3. Decreased (categories 4 and 6)