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. 2017 Jun 27;12(6):e0179196. doi: 10.1371/journal.pone.0179196

Table 3. Factor analysis results and item statistics of cognitive domain of food and nutrition literacy after item deleted because of increasing alpha in students aged 10–12 (n = 373).

EFA factor loadings of cognitive domain
scale items, subscales, and total Understanding Knowledge α if item deleted
1. Understanding
Q11_1 When shopping, how important is the nutritional information about food ingredients for you? 0.586 -0.058 0.676
Q11_3 When shopping, how important is standardized labeling on food packages for you? 0.577 -0.205 0.691
Q11_2 When shopping, how important are production and expiration dates for you? 0.564 0.071 0.679
Q13 I can easily understand the nutrition facts (e.g. amount of energy, sugar, protein, etc.) on food packages. 0.467 -0.038 0.680
Q12 I can easily understand nutritional issues I read about in newspapers, magazines, and brochures. 0.449 0.021 0.675
Q14 I can understand nutritionists’ recommendations about health and nutritional requirements that are appropriate for my age group. 0.432 0.120 0.674
Q18_1 Boiling is one of the more healthy cooking methods. 0.386 0.010 0.692
Q16 I can understand information and recommendations about proper nutrition for children in the media (e.g., TV, Internet, radio, etc.) 0.356 0.192 0.677
Q4 Daily physical activity for 30–40 minutes prevents obesity. 0.274 0.110 0.701
Q20 I know how different vegetables are cultivated and grown. 0.226 0.058 0.708
Q3 Daily eating breakfast helps me to learn more. 0.213 0.188 -
Q10 Unhealthy food packing without standard sign and health license not to be used. 0.208 0.183 -
2. Knowledge
Q7 Consumption of salty snacks (e.g. chips, corn puffs, etc.) is harmful for health. -0.050 0.638 0.614
Q5 Excessive consumption of sugar, sweets, and chocolate is harmful for health. -0.115 0.623 0.635
Q6 Consumption of salami and sausage that are high in fat may cause obesity. 0.096 0.613 0.599
Q8 Consumption of salamis and sausages may cause cancer. -0.027 0.562 0.642
Q9 Reading of production and expiration date on food package is important for health. 0.192 0.289 0.689
Eigenvalue 3.85 1.59 -
Explained Variance (%) 18.40 5.31 -
Cronbach’s α total 0.71 0.69 -