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Table 1 Description and calculation of visibility, understanding, intended purchase, ability to modify intended purchases and nutritional scores and other sociodemographic variables used to the evaluate performance of labels in Chile

From: Development of the Chilean front-of-package food warning label

Scores Calculation Questions Score range
Visibility Percentage of participants who spontaneously identified the warning label over the total number of participants. Q9. Is there anything on the label of this product that attracts your attention? (three more important) 0-100%
The interviewed identified the warning label?
Yes/No
Understanding Addition of individual values of Q11, Q12, Q13 & Q14. For Q13 assigned values were either 0 (options 1-4) or 5 (option 5). Q11. How easy to understand is this message? 3-20
1. Very difficult to understand = 1
2. Difficult to understand = 2
3. Indifferent = 3
4. Easy to understand = 4
5. Very easy to understand = 5
Q12. According to this message, the excessive consumption of this product is (…)
1. Very healthy = 1
2. Healthy = 2
3. Indifferent = 3
4. Unhealthy = 4
5. Very unhealthy = 5
Q13. According to this message ¿which of the following nutrients is excessive? Score 0 or 51. Calories = 0
2. Sodium = 0
3. Calcium = 0
4. Saturated fats = 0
5. Sugar = 1
Q14. According to this message, you should consume (…)
1. A lot more of this product = 1
2. A bit more of this product = 2
3. Same as usual = 3
4. A bit less of this product = 4
5. Nothing at all of this product = 5
Intended purchase score Mean (SD) of the values obtained in Q16 (values range: 1 to 5). Q16. If the yogurt you usually buy had this message, would you buy it? 1-5
1. I would buy it for sure
2. It is likely that I would buy it
3. Indifferent
4. It is unlikely that I would buy it
5. I would not buy it
Ability to modify intended purchase 1 – (Q17 / Q5) ×  100 (weekly for women, monthly for adolescents). Q17. If the yogurt you usually buy had this message, how many products would you buy per week? ________ units 0-100%
Q5. How many units of yogurt do you buy per week? _______ units
Nutritional conscience Addition of individual values from Q22 and Q23. Q22. When you buy foods, how important are the nutritional characteristics of the product in your purchase decision? 2-10
1. Not important at all
2. Not very important
3. Indifferent
4. Important
5. Very important
Q23. When you buy packaged foods, how often you read the nutrition fact panel
1. Never
2. Almost never
3. Sometimes
4. Frequently
5. Always
Education level Percentage of women who answered options 5, 6, 7, 8 or 9 in Q8. Q8. Are you studying currently? 0-100%
1. Yes
2. No
If question 8 = Yes→ What’s your current educative level?
If question 8 = No→ What’s your last approved level?
1. Never assisted
2. Special education (differential)
3. Primary of preparatory (old system)
4. Primary school
5. Humanity or Commercial technique, Industrial or Normalist (old system)
6. Secondary school
7. Superior level technic
8. Professional
9. Master or PhD
99. Do not know
Body mass index Q25 / (Q24 x Q24); the mean value of the range was used if a specific number was not provided. Q25. Which is your weight?_________ kilograms  
Alternatively, a weight range can be selected
1. <  45 kg
2. 46 - 60 kg
3. 61 - 70 kg
4. >  70 kg
Q24. Which is your height?_________ meters
Alternatively, a height range can be selected
1. <  1.40 m
2. 1.41 - 1.50 m
3. 1.51 - 1.60 m
4. >  1.61 m
Comparative prototype score for multiple critical nutrients in excess Addition of individual values of Q28a, 28b and 28c. When a given prototype was mentioned in first place the assigned value was = 1, when a given prototype was mentioned in second place the assigned value was = 0, when both prototyped were mentioned in first place the assigned value for each one was = 1. Q28a. In the case that more than one nutrient is excessive, which of these 2 ways of presenting the message is easier for you to see? 0-3
1. Option 1
2. Option 2
Q28b. In the case that more than one nutrient is excessive, which of these 2 ways of presenting the message is easier for you to understand?
1. Option 1
2. Option 2
Q28c. In the case that more than one nutrient is excessive, which of these 2 ways of presenting the message would have greater influence in your purchase decision?
1. Option 1
2. Option 2