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High factor loading (≥0.5) of items show high convergent validity of the items [ 26].
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Most items show highest loadings on the factor they are assigned to, except for nine out of 35 items in the Child version and ten out of 43 items in the Parent version.
All 10 items showed high discriminatory power between.55 and.75 (Table 1).
The 12 items showed high internal consistency (Cronbach's alpha = 0.91).
Two items showed high difficulties (D < 0.20), i.e., it was very difficult to reach high values in these items.
In a word, although some items exhibited somewhat of ceiling effect, there are no items showing high floor effect.
In the study by Moberg-Mogren & Nelson [ 12], 77% of the CONSORT items showed high ICC (i.e. above 0.70), and 57% of the NMECI items showed high kappa coefficients (i.e. above 0.70).
However, seven of the 34 items showed high missing value rates (9.7% to 53.6%, primarily due to "not applicable" responses).
Dietary patterns were named according to the food items showing high loading (absolute value) on each of four factors.
Moreover, all items showed high item-total correlation scores (column 3) and high test-retest correlation coefficients (column 4) and intraclass correlation coefficients (column 5).
The four 7-point items showed high correlations (greater than 0.7) with the ECOS-16 score, the item 'Limitation in daily activities' being the highest correlated item (0.82).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com