Table 1.

Questionnaire items and answer categories used to examine dietary behaviours

Question	Answer categories
Consumption of sugar-sweetened beverages
On how many days did you drink soft drinks/fruit juice last week?	None, 1, 2, 3, 4, 5, 6, 7
On days that you drank soft drinks/fruit juice, how many glasses/bottles/cans did you drink?	None, 1, 2, 3, 4, 5, 6, 7+ glasses/bottles/cans per day
Consumption of snacks
How many of the following did you eat yesterday? (in between meals)
Warm snacks	None, 1, 2, 3, 4, 5, 6, 7+
Nuts	None, 1, 2, 3, 4, 5, 5+ handfuls
Crisps	None, 1 (30 g), 2, 3, 4 (125 g), 5, 6, 7 (200 g), 8, 9, 10 (300 g), 10+ portions
Cheese	None, 1, 2, 3, 4, 5, 5+ pieces
Pastry	None, 1, 2, 3, 4, 5, 5+ pieces
Candy bars	None, 1, 2, 3, 4, 5, 5+ pieces
Chocolate	None, less than a quarter, quarter, half, whole bar (75–100 g), one and a half bars, more than one and a half bars
Cookies	None, 1, 2, 3, 4, 5, 6, 7+
Candy	None, 1–9, 10–19, 20–29, 30+ sweets
Consumption of fruit
How many pieces of fruit did you eat yesterday?	None, 1, 2, 3, 4, 5, 6, 7+ pieces
Consumption of vegetables
How many spoons of cooked/baked/steamed warm vegetables/salad did you eat yesterday?	None, 1, 2, 3, 4, 5, 6, 7+ spoons