Table 1.

Adaptation of questionnaire items to the theoretical framework of acceptability (TFA) constructs

TFA Construct	Definition	Corresponding Questionnaire Items
Affective Attitude	How an individual feels about the intervention (positive or negative emotions)	- Satisfaction with the explanation for participation in the study - Comfort level in answering the CRAFFT questions
Burden	The perceived amount of effort required to participate	- Ease of answering the CRAFFT questions - The time taken to complete the CRAFFT tool
Ethicality	The extent to which the intervention fits with the individual’s values	- Satisfaction with screening being conducted during care for other health conditions - Satisfaction with screening being conducted by a health worker
Intervention Coherence	The extent to which participants understand the intervention and how it works	- Satisfaction with the explanation for participation in the study - Experience of being asked about substance use
Opportunity Costs	The extent to which benefits or values must be sacrificed to participate	(Not explicitly covered in the listed items)
Perceived Effectiveness	The extent to which the intervention is perceived as likely to achieve purpose	- Likelihood of encouraging family and friends to be screened using the CRAFFT tool
Self-efficacy	Confidence that one can perform the behaviors required by the intervention	- Willingness to answer substance use questions at another time if recommended by a health worker