n (%)	n (%)	n (%)	n (%)
Question 1: Sex	Male	Female
Question 2: Age
Question 3: Smoke	Yes	No
Question 4: COVID Vaccination	Yes	No
Question 5: COVID Positivity	Yes	No
Question 6: Gastrointestinal disorders/Other disease	Yes	No
Question 7: Do you practice physical activity?	Yes	No
Question 8: If yes, how many times a week?	<1 time per week	1–2 times per week	2–3 times per week	>3 times per week
Question 9: Have you been trying to lose weight in the past three months? If not: Have you tried to avoid gaining weight?	No attempt to either lose or avoid gaining weight in the past three months	Attempts to both lose weight and avoid gaining weight in the past three months for reasons related to body shape or weight
Question 10: Do you pay close attention to the calorific value of food?	Yes	No
Question 11: How many portions of sweets do you consume per week? (Chocolates (1 portion = 3 g) biscuits and similar)	<1 serving per week	2 servings per week	>2 servings per week
Question 12: How many servings of red meat do you eat per week? (Beef, pork, lamb, 1 portion 100–150 g)	<1 serving per week	2 servings per week	>2 servings per week
Question 13: How many servings of processed meat do you consume per week? (sausages and similar; 1 portion = 50 g)	<1 serving per week	2 servings per week	>2 servings per week
Question 14: How many eggs do you eat per week? (1 serving = 1 egg)	<1 serving per week	2 servings per week	>2 servings per week
Question 15: How many servings of legumes do you consume per week? (Lentils, beans, peas, chickpeas (1 serving = 1 plate or 150 g)	<1 serving per week	1 serving per week	2 servings per week	>2 servings per week
Question 16: How many portions of white meat do you eat per week? (Poultry, rabbit—1 serving = 150 g)	<1 serving per week	2 servings per week	>2 servings per week
Question 17: How many servings of fish or seafood do you eat per week? (White/fatty fish (1 serving = 100–150 g), canned fish (1 serving = 1 can or 50 g), seafood (1 serving = 200 g))	<1 serving per week	2 servings per week	>2 servings per week
Question 18: How many dairy products do you consume per day? (Milk—1 portion = 200 mL milk, two yogurts, 1 portion of spreadable cheese)	<1 serving per day	2 servings per day	>2 servings per day
Question 19: How much fruit do you consume per day? (All fruit and fresh fruit juices—1 serving = 150–200 g)	<1 serving per day	1–2 servings per day	3–4 servings per day	>4 servings per day
Question 20: How many servings of vegetables do you consume per day? (1 portion = 150–200 g)	<1 serving per day	1–2 servings per day	>2 servings per day
Question 21: How many tablespoons of olive oil do you consume per day (cooking or salad dressing)? (Olive oil, extra virgin olive oil—1 serving = 1 tablespoon)	<1 serving per day	1–2 servings per day	>2 servings per day
Question 22: How many servings of cereals do you consume per day? (White and wholemeal bread—1 serving = 40 g, half sandwich, cereals—1 serving = 1 plate of rice, pasta or 40 g of breakfast cereal)	<1 serving per day	1–2 servings per day	>2 servings per day
Question 23: Do you drink more than 6 glasses of water or at least one cup of tea a day? (Water or tea—1 glass serving)	Yes	No
Question 24: Do you drink wine every day with meals? (White/red wine (1 serving = 1 glass of wine))	<1 serving per day	1–2 servings per day	>2 servings per day
Question 25: Do you limit adding salt to meals?	Yes	No
Question 26: Do you usually use nibbling between meals? Do you consume snacks between meals?	Yes	No
Question 27: Do you limit your sugar intake in drinks? (including sugary drinks)	Yes	No
Question 28: How many hours do you spend watching TV a day?	<1 h per day	1 h a day	2 h a day	>2 h a day