Development and Validation of the Coeliac Disease Food Attitudes and Behaviours Scale
Table 2
Removal criteria for CD-FAB items.
Spread of responses across options
High endorsement of a single item suggests poor discriminatory power. Items were considered for removal if >80% or <20% were an agree-type statement or a disagree-type statement
16 removed
Internal consistency
Items with a corrected item-domain total correlation < 0.3 or in a domain with a poor Cronbach’s alpha < 0.7 were considered for removal
1 removed
Timing of administration of questionnaire
Needs to be applicable to people from the point of coeliac disease diagnosis onwards, so all individuals with coeliac disease can complete the scale
2 reworded
Clarity and relevance of items
Difficult to understand items were reworded or considered for removal
13 reworded
Items deemed theoretically important
These items were retained despite meeting the above criteria because they were deemed theoretically important
