Table 4.
Statistics relatively to all scale items and and internal consistency.
| n | Item | Mean 1 | Standard Deviation | Correlation Item-Total | Cronbach’s Alpha 2 |
|---|---|---|---|---|---|
| 1 | Find information on healthy eating (website of the General Health Directory—DGS)—official Portuguese website) | 3.92 | 1.28 | 0.472 | 0.981 |
| 2 | Find information on healthy eating (internet; television; books/magazines) | 4.36 | 0.88 | 0.523 | 0.981 |
| 3 | Understand information on healthy eating (DGS website) | 3.95 | 1.24 | 0.502 | 0.981 |
| 4 | Understand information on healthy eating (internet; television; books/magazines) | 4.28 | 08.4 | 0.657 | 0.980 |
| 5 | Find information on daily meal frequency | 4.15 | 09.6 | 0.621 | 0.980 |
| 6 | Understand the importance of eating several times a day | 4.37 | 0.83 | 0.542 | 0.981 |
| 7 | Eat the recommended meals throughout the day, such as always having breakfast | 4.18 | 09.1 | 0.433 | 0.981 |
| 8 | Find information on diets and regimes (calorie restriction; vegetarian/vegan; organic; diets suitable for certain diseases/intolerances (e.g., gluten-free)) | 3.99 | 1.02 | 0.605 | 0.980 |
| 9 | Understand the information about diets found on the internet | 4.05 | 09.7 | 0.686 | 0.980 |
| 10 | Understand the information about diets found in books/magazines | 3.95 | 1.09 | 0.652 | 0.980 |
| 11 | Practice a diet that fits the principles of healthy eating | 3.77 | 0.99 | 0.642 | 0.980 |
| 12 | Change your diet to a diet or diet suitable for certain diseases/intolerances | 3.59 | 1.10 | 0.614 | 0.980 |
| 13 | Find information on recommended portion sizes for each type of food | 3.95 | 1.03 | 0.696 | 0.980 |
| 14 | Understand recommendations on the amounts of food that should be consumed, when presented in portions | 3.98 | 0.99 | 0.758 | 0.980 |
| 15 | Understand the recommendations on the amounts of food that should be consumed, when presented in mass (grams) | 3.90 | 1.06 | 0.762 | 0.980 |
| 16 | Use the information to confirm that in your daily practice you consume the recommended amounts for your age and sex of the main food groups | 3.70 | 1.09 | 0.719 | 0.980 |
| 17 | Understand the information contained in the Portuguese Food Wheel | 4.35 | 0.88 | 0.714 | 0.980 |
| 18 | Find information on the nutritional quality of beverages | 4.02 | 1.02 | 0.715 | 0.980 |
| 19 | Understand the warnings about sugary drinks/soda consumption | 4.32 | 0.93 | 0.686 | 0.980 |
| 20 | Understand information about energy drinks (such as Red Bull) | 4.17 | 1.06 | 0.670 | 0.980 |
| 21 | Use the information to match your daily fluid intake needs | 4.10 | 0.98 | 0.738 | 0.980 |
| 22 | Find information about the Mediterranean Diet | 3.91 | 1.19 | 0.728 | 0.980 |
| 23 | Understand the assumptions of the Mediterranean Diet | 3.83 | 1.21 | 0.732 | 0.980 |
| 24 | Practice eating habits that conform to the standards of the Mediterranean Diet | 3.65 | 1.20 | 0.677 | 0.980 |
| 25 | Understand the benefits and risks associated with taking dietary supplements | 3.88 | 1.16 | 0.718 | 0.980 |
| 26 | Understand the usefulness of taking food supplements (Multivitamins, vitamins, calcium, Omega 3, etc.) | 3.94 | 1.12 | 0.713 | 0.980 |
| 27 | Find information on the use of salt in food | 4.21 | 0.98 | 0.780 | 0.980 |
| 28 | Understand the risks of excessive use of salt in food | 4.30 | 0.94 | 0.776 | 0.980 |
| 29 | Use the information to control the use of salt in your diet | 4.10 | 1.03 | 0.751 | 0.980 |
| 30 | Find information on the role of fats in food | 4.20 | 0.99 | 0.782 | 0.980 |
| 31 | Find information on the differences between saturated and unsaturated fats | 3.94 | 1.12 | 0.807 | 0.980 |
| 32 | Understand the effects resulting from the consumption of saturated and unsaturated fats | 3.97 | 1.14 | 0.781 | 0.980 |
| 33 | Moderate the use of fat in your diet | 3.92 | 1.02 | 0.753 | 0.980 |
| 34 | Avoid the use of saturated fats in your diet | 3.83 | 1.07 | 0.734 | 0.980 |
| 35 | Find information on the role of carbohydrates in food (rice; potato, pasta…) | 4.21 | 1.00 | 0.778 | 0.980 |
| 36 | Understand the type of carbohydrates you eat in your diet | 4.01 | 1.05 | 0.797 | 0.980 |
| 37 | Find information on the role of dietary fiber in health | 4.09 | 1.05 | 0.806 | 0.980 |
| 38 | Understand the benefits of consuming dietary fiber | 4.09 | 1.05 | 0.786 | 0.980 |
| 39 | Understand the benefits or drawbacks of excessive consumption of dietary fiber | 3.96 | 1.11 | 0.792 | 0.980 |
| 40 | Practice a diet that contains the recommended amounts of dietary fiber | 3.77 | 1.08 | 0.778 | 0.980 |
| 41 | Find information on the importance of adequate protein consumption in food (meat; fish; beans…) | 4.13 | 1.03 | 0.797 | 0.980 |
| 42 | Find information on animal and plant protein sources | 4.08 | 1.05 | 0.808 | 0.980 |
| 43 | Understand the recommended amounts for protein intake | 3.93 | 1.15 | 0.812 | 0.980 |
| 44 | Understand the effects of excessive protein consumption | 3.90 | 1.16 | 0.765 | 0.980 |
| 45 | Moderate your protein intake | 3.81 | 1.06 | 0.730 | 0.980 |
| 46 | Find information on how to interpret food labels | 3.93 | 1.12 | 0.795 | 0.980 |
| 47 | Understand the information conveyed on food labels | 3.90 | 1.06 | 0.757 | 0.980 |
| 48 | Find information about the nutritional semaphore on food labels | 3.55 | 1.37 | 0.666 | 0.980 |
| 49 | Understand the nutritional semaphore on food labels | 3.57 | 1.36 | 0.633 | 0.981 |
| 50 | Use food labelling to help make healthier food choices | 3.84 | 1.10 | 0.694 | 0.980 |
1 Scale: 1 = Very difficult, 2 = Difficult, 3 = Easy, 4 = Very easy, 5 = Do not know. 2 Cronbach’s alpha without the item.