Table 3.

Summary of questionnaires.

	How administered	What it measures	Which participants
Otago short-form FFQ (25)	On REDCap	Habitual dietary intake	All index participants and household/whānau participants aged 11y and over
Three factor eating questionnaire or child version (26)	Emailed survey which will be linked to REDCap	Cognitive restraint uncontrolled eating and emotional eating	All index participants and household/whānau participants aged 11y and over
24 h Food recall	On intake 24 website (https://intake24.co.uk/info/recall)	Dietary intake in previous 24 h	All index participants and household/whānau participants aged 11y and over
IPAQ Physical activity (27)	On REDCap	Habitual physical activity	All index participants and household/whānau participants aged 11y and over
SF 36 (28)	On REDCap	Quality of life	All index participants and household/whānau participants aged 11y and over
Kaupapa Māori Wellbeing questionnaire	On REDCap	Covering the four realms of Te Whare Tapa Whā to determine quality of life from a Māori perspective	Any Māori participants aged 11y and over
Gastrointestinal symptom rating scale (29)	On REDCap	Gastrointestinal symptoms	All index participants and household/whānau participants aged 11y and over
Self-evaluation COM Questionnaire (30)	On REDCap	Evaluates the process; assesses participant perceptions of barriers and enablers throughout the study to see if the behavior change support is working as it is intended	Index participants
Impact Evaluation for Nutrition and Behavior Change Support (31)	On REDCap	Assesses how the behavior change support impacts participants (including engagement, satisfaction, and perception of impact)	Index participants

FFQ, food frequency questionnaire; IPAQ, international physical activity questionnaire; COM, capability opportunity motivation.