Table 1 Dietary behaviour questionnaires

Food choice

Frequently eating out

Do you usually eat out (except staff restaurant) about twice a week?

Do you overeat when you eat out (except in the staff cafeteria)?

Fast/instant/takeaway food

Do you eat bread, pizza, and chicken instead of your regular meal at dinner?

Do you often eat instant food or fast food such as ramen?

Eating behaviour

Meal irregularity and speed

How often do you skip meal?

Do you eat at a regular time?

How fast do you eat your meal?

Frequent or night snacking

Do you eat snacks within 3 h before sleep?

Do you eat your dinner late at night?

Do you sometimes eat snacks when you are watching TV or reading the newspaper?

Overeating/binge eating

Do you eat more food than you had planned to?

Can you stop eating when you are full?

Do you continue to eat even after you feel like stopping?

Do you overeat frequently?

Do you sometimes eat food although you are not hungry?

Emotional eating

Do you eat food on impulse?

Do you eat food when you feel depressed or unhappy?

Do you eat food when you feel anxiety or stress?

Do you feel that you can recover yourself through eating sugary food?

Nutrient

High-calorie dense food

Do you eat foods containing sugar (crackers, candy, chocolates, cakes, ice cream) every day?

Do you drink soft drinks, vitamin drinks, or fruit juice instead of water

Do you often eat greasy food such as fried food, stir-fries, or salad dressing?

Do you like meat?

Salty food

Do you usually eat a lot of kimchi or salt-pickled vegetables?

Do you eat all the broth in soups or stews?

Do you often add salt or soy sauce before eating soups?

Unbalanced food

Are you having fruits or fruit juice every day?

Do you eat vegetables in each meal (except kimchi)?

Are you eating at least one of the following foods: meat, fish, egg, bean, and tofu when you have a meal?

Do you prefer to eat multi-grain rice over white rice?