Table 5.
The results of principal component analysis (Eigenvalues and percentage of explained variance) and reliability testing (Cronbach’s Alpha and ICC) for all dimensions of food and nutrition literacy
| Domains | Dimensions | Number of items | Eigen value | percentage of explained variance | Cronbach’s Alpha | ICC/Pearson coefficient |
|---|---|---|---|---|---|---|
| knowledge | Food and nutrition knowledge | 27 | 3.67 | 13.59 | 0.742 | 0.709a |
| skills | Functional skills | 11 | 4.185 | 12.68 | 0.823 | 0.903b |
| Interactive skills | 7 | 3.323 | 9.79 | 0.714 | 0.816b | |
| Advocacy | 7 | 2.978 | 9.02 | 0.773 | 0.861b | |
| Critical analysis of information | 5 | 2.1 | 6.36 | 0.643 | 0.593b | |
| Food label reading skills | 3 | 1.919 | 5.81 | 0.559 | 0.681a | |
| Whole questionnaire | 60 | 0.841 | 0.928 |
ICC, Intraclass Correlation Coefficient. athe value is Pearson correlation coefficient. bthe value is Intraclass Correlation Coefficient